was read the article
array:24 [ "pii" => "S1807593222029027" "issn" => "18075932" "doi" => "10.1590/S1807-59322010001100018" "estado" => "S300" "fechaPublicacion" => "2010-01-01" "aid" => "2902" "copyright" => "CLINICS" "copyrightAnyo" => "2010" "documento" => "article" "crossmark" => 0 "licencia" => "https://creativecommons.org/licenses/by-nc/3.0/" "subdocumento" => "fla" "cita" => "Clinics. 2010;65:1155-60" "abierto" => array:3 [ "ES" => true "ES2" => true "LATM" => true ] "gratuito" => true "lecturas" => array:1 [ "total" => 0 ] "itemSiguiente" => array:19 [ "pii" => "S1807593222029039" "issn" => "18075932" "doi" => "10.1590/S1807-59322010001100019" "estado" => "S300" "fechaPublicacion" => "2010-01-01" "aid" => "2903" "copyright" => "CLINICS" "documento" => "article" "crossmark" => 0 "licencia" => "https://creativecommons.org/licenses/by-nc/3.0/" "subdocumento" => "fla" "cita" => "Clinics. 2010;65:1161-6" "abierto" => array:3 [ "ES" => true "ES2" => true "LATM" => true ] "gratuito" => true "lecturas" => array:1 [ "total" => 0 ] "en" => array:12 [ "idiomaDefecto" => true "cabecera" => "<span class="elsevierStyleTextfn">CLINICAL SCIENCE</span>" "titulo" => "Absence of the predisposing factors and signs and symptoms usually associated with overreaching and overtraining in physical fitness centers" "tienePdf" => "en" "tieneTextoCompleto" => "en" "tieneResumen" => "en" "paginas" => array:1 [ 0 => array:2 [ "paginaInicial" => "1161" "paginaFinal" => "1166" ] ] "contieneResumen" => array:1 [ "en" => true ] "contieneTextoCompleto" => array:1 [ "en" => true ] "contienePdf" => array:1 [ "en" => true ] "resumenGrafico" => array:2 [ "original" => 0 "multimedia" => array:7 [ "identificador" => "fig1-cln_65p1161" "etiqueta" => "Figure 1" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr1.jpeg" "Alto" => 287 "Ancho" => 442 "Tamanyo" => 17284 ] ] "descripcion" => array:1 [ "en" => "<p id="spara10" class="elsevierStyleSimplePara elsevierViewall">Comparison of the POMS profile of the physical fitness center members (♦) with those of elite athletes with signs of overtraining<a class="elsevierStyleCrossRef" href="#bib1">1</a> (▴) and elite athletes who show no signs of overtraining<a class="elsevierStyleCrossRef" href="#bib22">22</a> (▪).</p>" ] ] ] "autores" => array:1 [ 0 => array:2 [ "autoresLista" => "Carolina Ackel-D'Elia, Rodrigo Luiz Vancini, Adauto Castelo, Viviane Louise Andrée Nouailhetas, Antonio Carlos da Silva" "autores" => array:5 [ 0 => array:2 [ "nombre" => "Carolina" "apellidos" => "Ackel-D'Elia" ] 1 => array:2 [ "nombre" => "Rodrigo Luiz" "apellidos" => "Vancini" ] 2 => array:2 [ "nombre" => "Adauto" "apellidos" => "Castelo" ] 3 => array:2 [ "nombre" => "Viviane Louise Andrée" "apellidos" => "Nouailhetas" ] 4 => array:2 [ "nombre" => "Antonio Carlos" "apellidos" => "da Silva" ] ] ] ] ] "idiomaDefecto" => "en" "EPUB" => "https://multimedia.elsevier.es/PublicationsMultimediaV1/item/epub/S1807593222029039?idApp=UINPBA00004N" "url" => "/18075932/0000006500000011/v1_202212010805/S1807593222029039/v1_202212010805/en/main.assets" ] "itemAnterior" => array:19 [ "pii" => "S1807593222029015" "issn" => "18075932" "doi" => "10.1590/S1807-59322010001100017" "estado" => "S300" "fechaPublicacion" => "2010-01-01" "aid" => "2901" "copyright" => "CLINICS" "documento" => "article" "crossmark" => 0 "licencia" => "https://creativecommons.org/licenses/by-nc/3.0/" "subdocumento" => "fla" "cita" => "Clinics. 2010;65:1149-53" "abierto" => array:3 [ "ES" => true "ES2" => true "LATM" => true ] "gratuito" => true "lecturas" => array:1 [ "total" => 0 ] "en" => array:12 [ "idiomaDefecto" => true "cabecera" => "<span class="elsevierStyleTextfn">CLINICAL SCIENCE</span>" "titulo" => "Metabolic disorders prevalence in sudden deafness" "tienePdf" => "en" "tieneTextoCompleto" => "en" "tieneResumen" => "en" "paginas" => array:1 [ 0 => array:2 [ "paginaInicial" => "1149" "paginaFinal" => "1153" ] ] "contieneResumen" => array:1 [ "en" => true ] "contieneTextoCompleto" => array:1 [ "en" => true ] "contienePdf" => array:1 [ "en" => true ] "resumenGrafico" => array:2 [ "original" => 0 "multimedia" => array:7 [ "identificador" => "fig1-cln_65p1149" "etiqueta" => "Figure 1" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr1.jpeg" "Alto" => 312 "Ancho" => 478 "Tamanyo" => 15256 ] ] "descripcion" => array:1 [ "en" => "<p id="spara10" class="elsevierStyleSimplePara elsevierViewall">Prevalence of hyperglycemia in patients with sudden deafness and in the general population.</p>" ] ] ] "autores" => array:1 [ 0 => array:2 [ "autoresLista" => "Jeanne Oiticica, Roseli Saraiva Moreira Bittar" "autores" => array:2 [ 0 => array:2 [ "nombre" => "Jeanne" "apellidos" => "Oiticica" ] 1 => array:2 [ "nombre" => "Roseli Saraiva Moreira" "apellidos" => "Bittar" ] ] ] ] ] "idiomaDefecto" => "en" "EPUB" => "https://multimedia.elsevier.es/PublicationsMultimediaV1/item/epub/S1807593222029015?idApp=UINPBA00004N" "url" => "/18075932/0000006500000011/v1_202212010805/S1807593222029015/v1_202212010805/en/main.assets" ] "en" => array:19 [ "idiomaDefecto" => true "cabecera" => "<span class="elsevierStyleTextfn">CLINICAL SCIENCE</span>" "titulo" => "Clinical and haemodynamic evaluation of chronic thromboembolic pulmonary hypertension patients scheduled for pulmonary thromboendarterectomy. Is schistosomiasis hypertension an important confounding factor?" "tieneTextoCompleto" => true "paginas" => array:1 [ 0 => array:2 [ "paginaInicial" => "1155" "paginaFinal" => "1160" ] ] "autores" => array:1 [ 0 => array:4 [ "autoresLista" => "Mario Terra-Filho, Marcos Figueiredo Mello, Mônica Silveira Lapa, Ricardo Henrique Oliveira Braga Teixeira, Fábio Biscegli Jatene" "autores" => array:5 [ 0 => array:4 [ "nombre" => "Mario" "apellidos" => "Terra-Filho" "email" => array:1 [ 0 => "pnemario@incor.usp.br" ] "referencia" => array:2 [ 0 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">I</span>" "identificador" => "af1-cln_65p1155" ] 1 => array:2 [ "etiqueta" => "*" "identificador" => "c1-cln_65p1155" ] ] ] 1 => array:3 [ "nombre" => "Marcos Figueiredo" "apellidos" => "Mello" "referencia" => array:1 [ 0 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">II</span>" "identificador" => "af2-cln_65p1155" ] ] ] 2 => array:3 [ "nombre" => "Mônica Silveira" "apellidos" => "Lapa" "referencia" => array:1 [ 0 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">III</span>" "identificador" => "af3-cln_65p1155" ] ] ] 3 => array:3 [ "nombre" => "Ricardo Henrique Oliveira Braga" "apellidos" => "Teixeira" "referencia" => array:1 [ 0 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">I</span>" "identificador" => "af1-cln_65p1155" ] ] ] 4 => array:3 [ "nombre" => "Fábio Biscegli" "apellidos" => "Jatene" "referencia" => array:1 [ 0 => array:2 [ "etiqueta" => "<span class="elsevierStyleSup">IV</span>" "identificador" => "af4-cln_65p1155" ] ] ] ] "afiliaciones" => array:4 [ 0 => array:3 [ "entidad" => "Pulmonary Division, Instituto do Coração, Faculdade de Medicina, Universidade de São Paulo, São Paulo, Brazil" "etiqueta" => "I" "identificador" => "af1-cln_65p1155" ] 1 => array:3 [ "entidad" => "Faculdade de Medicina, Universidade de São Paulo, São Paulo, Brazil" "etiqueta" => "II" "identificador" => "af2-cln_65p1155" ] 2 => array:3 [ "entidad" => "Pneumology Division, Faculdade de Medicina do ABC, Santo André, SP, Brazil" "etiqueta" => "III" "identificador" => "af3-cln_65p1155" ] 3 => array:3 [ "entidad" => "Thoracic Surgery, Instituto do Coração, Faculdade de Medicina, Universidade de São Paulo, São Paulo, Brazil" "etiqueta" => "IV" "identificador" => "af4-cln_65p1155" ] ] "correspondencia" => array:1 [ 0 => array:3 [ "identificador" => "c1-cln_65p1155" "etiqueta" => "*" "correspondencia" => "Tel.: 55 11 3069-5695" ] ] ] ] "resumenGrafico" => array:2 [ "original" => 0 "multimedia" => array:7 [ "identificador" => "fig3-cln_65p1155" "etiqueta" => "Figure 3" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr3.jpeg" "Alto" => 377 "Ancho" => 478 "Tamanyo" => 10320 ] ] "descripcion" => array:1 [ "en" => "<p id="spara30" class="elsevierStyleSimplePara elsevierViewall">Correlation between PVR and PSM.</p>" ] ] ] "textoCompleto" => "<span class="elsevierStyleSections"><span id="cesec10" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle70">INTRODUCTION</span><p id="para10" class="elsevierStylePara elsevierViewall">Pulmonary arterial hypertension (PAH), defined as a mean pulmonary arterial pressure ≥ 25 mmHg at rest or > 30 mmHg during exercise,<a class="elsevierStyleCrossRef" href="#bib1">1</a> is a rare disease that leads to heart failure and death. There are many diseases that cause PAH, including idiopathic pulmonary arterial hypertension (IPAH). In addition, PAH is associated with anorexigen exposure, sleep apnea, collagenoses, chronic thromboembolic pulmonary hypertension (CTEPH) and schistosomiasis.<a class="elsevierStyleCrossRefs" href="#bib1">1,2</a></p><p id="para20" class="elsevierStylePara elsevierViewall">Schistosomiasis is an important cause of PAH in the developing world.<a class="elsevierStyleCrossRefs" href="#bib3">3,4</a> Unlike other countries, schistosomiasis-associated PAH (Sch-PAH) was found to be more prevalent than PAH associated with anorexigen exposure at a referral center for PAH in Sao Paulo.<a class="elsevierStyleCrossRefs" href="#bib3">3,5</a></p><p id="para30" class="elsevierStylePara elsevierViewall">CTEPH is a disease that affects approximately 4,000 people per year in the United States, and its incidence rate is 1–5% within two years after the thromboembolic event.<a class="elsevierStyleCrossRefs" href="#bib6">6–8</a> The incidence in Brazil is currently unknown; however, if the same numbers were used to forecast the incidence in Brazil, there would be around 1,525 new CTEPH cases each year in the country. CTEPH is caused by clot obstruction in pulmonary arteries, leading to an increased pulmonary vascular resistance (PVR) and pulmonary hypertension (PH).<a class="elsevierStyleCrossRefs" href="#bib6">6,7</a> CTEPH is a severe disease characterized by persistent PAH after at least three months of an acute pulmonary thromboembolic episode.<a class="elsevierStyleCrossRef" href="#bib9">9</a> The average survival of patients with CTEPH without treatment is approximately three years. Pulmonary thromboendarterectomy (PTE) for select patients is a potentially curative procedure when correctly indicated,<a class="elsevierStyleCrossRef" href="#bib10">10</a> leading to a significant improvement in the quality of life.<a class="elsevierStyleCrossRef" href="#bib2">2</a> The success of PTE surgery is dependent on patient suitability. There is, however, no age restriction for this intervention.<a class="elsevierStyleCrossRefs" href="#bib11">11,12</a></p><p id="para40" class="elsevierStylePara elsevierViewall">In Brazil, the clinical and hemodynamic profiles of CTEPH patients have yet to be described. PAH due to schistosomiasis is frequent and may be a confounding factor in the indication of PTE, given that PAH can sometimes be characterized by <span class="elsevierStyleItalic">in situ</span> thrombosis and the appearance of apparent clots in the pulmonary arteries on chest angiotomography (<a class="elsevierStyleCrossRef" href="#fig1-cln_65p1155">Figure 1</a>). Important distal vessel remodeling, however, can be observed. Therefore, PTE indication may be incorrect for such patients because PAH will not decrease after surgical treatment, contrary to what is observed in the majority of subjects who undergo PTE. Because of these issues, it is important to establish a clinical and hemodynamic profile of CTEPH patients in Brazil who are scheduled for PTE.</p><elsevierMultimedia ident="fig1-cln_65p1155"></elsevierMultimedia><p id="para50" class="elsevierStylePara elsevierViewall">The aim of this study was to evaluate the clinical and hemodynamic characteristics of patients with CTEPH who are scheduled for PTE at a referral center for treatment of this disease in Brazil.</p></span><span id="cesec20" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle80">METHODOLOGY</span><p id="para60" class="elsevierStylePara elsevierViewall">The present investigation was approved by the Research Ethics Committee of São Paulo Medical School, and informed written consent was obtained from all patients. This study was a transversal retrospective study with a prospective insertion.</p><p id="para70" class="elsevierStylePara elsevierViewall">From December 2006 to November 2009, patients with PAH were evaluated and scheduled for PTE. Thirty-five consecutive patients with CTEPH were eligible for PTE. Diagnosis of CTEPH was established by transthoracic echocardiography with Doppler, showing PH defined by a right ventricular systolic pressure (RVSP) > 35 mmHg, chest angiotomography, pulmonary angiography images compatible with thrombus and right-sided heart catheterization (RHC). Schistosomiasis was established by medical history, epidemiological characteristics and positive stool analysis for <span class="elsevierStyleItalic">S. mansoni</span> ova. Patients were classified according to gender, age and functional class.</p><p id="para80" class="elsevierStylePara elsevierViewall">Inclusion criteria consisted of operable CTEPH, characterized by central thrombotic lesions that are surgically accessible; a PVR > 300 dynas·s·cm<span class="elsevierStyleSup">-5</span> (or 3.75 Woods); a mean pulmonary artery pressure (mPAP) ≥ 25 mmHg in the presence of a pulmonary capillary wedge pressure < 15 mmHg and a signed consent form.</p><p id="para90" class="elsevierStylePara elsevierViewall">Patients were excluded if they had a predominance of peripheral vascular obstruction on angiography; a creatinine clearance lower than 60 ml/min with a reduced or normal BNP level; or important comorbidities, including left heart failure, severe obstructive or restrictive pulmonary disease or neoplasia.</p><span id="cesec30" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle90">Clinical and functional evaluation</span><p id="para100" class="elsevierStylePara elsevierViewall">A medical history was taken from each patient, followed by a physical examination. Demographic data, the presence of other diseases, the use of medications and the presence/absence of dyspnoea, hemoptysis, syncope, cough, thoracic pain, dizziness and palpitations were recorded. Patients were classified according to severity using the New York Heart Association functional classification (modified) (World Health Association), and a 6-minute walk test (6MWT) was performed based on the American Thoracic Society protocol.<a class="elsevierStyleCrossRef" href="#bib13">13</a></p></span><span id="cesec40" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle100">Hemodynamic measurements and acute vasodilator testing</span><p id="para110" class="elsevierStylePara elsevierViewall">After clinical, functional and radiological evaluation, PAH patients were submitted to RHC according to a previously described protocol.<a class="elsevierStyleCrossRef" href="#bib14">14</a> Briefly, for RHC, a triple-lumen balloon-tipped catheter was inserted through the internal jugular vein (Swan-Ganz, model 131F7; Baxter, Edwards Critical Care Division, Irvine, CA). The pulmonary arterial pressure (PAP), pulmonary vascular resistance (PVR), pulmonary arterial occlusion pressure (PAOP) and cardiac output (CO) were measured. The indexed PVR (IPVR) and cardiac index (CI) were also calculated. Hemodynamic data were collected at baseline and after the administration of inhaled nitric oxide (NO) for 10 minutes. A complete hemodynamic status response was defined by a decrease in mPAP of at least 10 mmHg and an absolute decrease of mPAP under 40 mmHg in the presence of normal or increased CO during NO inhalation.</p></span><span id="cesec50" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle110">Laboratory tests</span><p id="para120" class="elsevierStylePara elsevierViewall">Laboratory exams consisted of quantification of serum protein S and C, antithrombin III, factor V Leiden, anticardiolipin antibodies, lupus anticoagulant and antiphospholipid antibody and a determination of the presence of mutant prothrombin, homocystein and BNP serum. Creatinine clearance was also calculated. Stool sample analyses for <span class="elsevierStyleItalic">S. mansoni</span> ova were obtained.</p></span><span id="cesec60" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle120">Statistical analysis</span><p id="para130" class="elsevierStylePara elsevierViewall">Continuous data are summarized as the mean and standard deviation (mean ± SD) or, in the case of a skewed distribution, as the median (25<span class="elsevierStyleSup">th</span> percentile–75<span class="elsevierStyleSup">th</span> percentile). Pearson correlation coefficients and regression analyses were calculated for the hemodynamic data. A p-value of < .05 was considered significant.</p></span></span><span id="cesec70" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle130">RESULTS</span><span id="cesec80" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle140">Patients</span><p id="para140" class="elsevierStylePara elsevierViewall">Thirty-five consecutive CTEPH patients were evaluated, and 31 were enrolled in the current study. Four patients were excluded, two who refused to be submitted to the RHC and two who tested positive for schistosomiasis. The characteristics of the patients enrolled are summarized in <a class="elsevierStyleCrossRef" href="#t1-cln_65p1155">Table I</a>, all submitted to clinical evaluation and haemodinamic studies, but the complete data were obtained in only 27 patients (technical limitations). Nineteen subjects were female, the majority of the patients were categorized in World Health functional classes III and IV, according to the diagnostic criteria defined by the World Health Organization.<a class="elsevierStyleCrossRefs" href="#bib13">13,15</a> All patients had severe PH (<a class="elsevierStyleCrossRef" href="#t1-cln_65p1155">Table I</a>).</p><elsevierMultimedia ident="t1-cln_65p1155"></elsevierMultimedia></span><span id="cesec90" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle150">Hemodynamic measurements</span><p id="para150" class="elsevierStylePara elsevierViewall">The hemodynamic data showed an increased PVR and low CO in the CTEPH patients (<a class="elsevierStyleCrossRef" href="#t2-cln_65p1155">Table II</a>). Twelve patients had a POAP higher than 14 mmHg. All patients had a negative acute reactivity test. There was a significant correlation between sPAP and RVSP (r = 0.44, p = 0.023).</p><elsevierMultimedia ident="t2-cln_65p1155"></elsevierMultimedia></span><span id="cesec100" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle160">As expected, linear regression revealed a direct relation between CO and PVR (<a class="elsevierStyleCrossRef" href="#fig2-cln_65p1155">Figure 2</a>)</span><p id="para160" class="elsevierStylePara elsevierViewall">We found that 18 of 27 patients had paradoxical septum motion (PSM) as determined by echocardiogram. PVR had a strong correlation with PSM (r = 0.63; p = 0.001) (<a class="elsevierStyleCrossRef" href="#fig3-cln_65p1155">Fig. 3</a>) and CO (r = -0.61; p = 0.001).</p><elsevierMultimedia ident="fig2-cln_65p1155"></elsevierMultimedia><elsevierMultimedia ident="fig3-cln_65p1155"></elsevierMultimedia></span><span id="cesec110" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle170">Laboratory findings</span><p id="para170" class="elsevierStylePara elsevierViewall">Twelve of 31 patients had hematological disorders, including the presence of factor V Leiden (n = 1), antithrombin III deficiency (n = 1), the presence of prothrombin mutation (n = 1), hyperhomocysteinemia (serum levels higher than 19 µmol/L) (n = 5), the presence of anticardiolipin and antiphospholipid antibodies (n = 3), the presence of the antinuclear factor (n = 3) and protein S deficiency (n = 1). None of the patients had protein C deficiency.</p><p id="para180" class="elsevierStylePara elsevierViewall">BNP serum levels were elevated in 19 of 27 patients [median: 138 (28–805) pg/mL], and BNP serum levels significantly correlated with the presence of PVR (r = 0.47, p = 0.018). BNP also had correlating trend with CO (r = -0.39, p = 0.053). No correlations were found between BNP and WHO functional class or 6MWT and RVSP.</p></span></span><span id="cesec120" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle180">DISCUSSION</span><p id="para190" class="elsevierStylePara elsevierViewall">In the present study, we found a predominance of women with CTEPH, consistent with data described by Jamieson et al.<a class="elsevierStyleCrossRef" href="#bib16">16</a> Despite the fact that the hospital at which this study was carried out is a referral center for CTEPH, very few patients had Sch-PAH. One of the possible explanations for this finding is that this hospital is also a referral center for PAH associated with causes other than CTEPH, and only patients that have central clots in their pulmonary arteries are sent to our CTEPH service. The second reason is that two of the authors (MTF and FBJ) have given lectures at national meetings for over 10 years to draw attention to this little-known disease and to encourage other doctors to send their CTEPH patients to our specialized service.</p><p id="para200" class="elsevierStylePara elsevierViewall">The majority of patients were categorized in WHO functional classes III or IV, which is explained by the fact that patients with serious vascular diseases and signs of right heart failure are always recommended to referral centers.<a class="elsevierStyleCrossRef" href="#bib10">10</a> This often occurs too late because the disease is not well known, and the diagnosis is difficult. The presence of high RVSP and PSM in these patients confirms this finding. Patients with PAH have an increase in right ventricle (RV) pressure and prolonged isovolumetric contraction. As a consequence, the diastolic RV pressure becomes higher than in the left ventricle, leading the septum to move paradoxically. Mori et al.<a class="elsevierStyleCrossRef" href="#bib17">17</a> described PSM as a low cardiac index predictor. In this study, PSM was significantly correlated with CO and PVR, indicating that patients with PSM were hemodynamically more deteriorated.</p><p id="para210" class="elsevierStylePara elsevierViewall">In walking tests, it has been shown that 345 meters is the cut-off point to predict survival post-PTE.<a class="elsevierStyleCrossRef" href="#bib18">18</a> Our patients walked a mean distance of 347 meters. It is reasonable to believe that our patients will not have an excellent post-PTE prognosis, as along with their poor 6MWT scores, their mean PVR was greater than 970 dynas·s·cm<span class="elsevierStyleSup">-5</span>. As indicated by Dartevelle et al., patients with a PVR lower than 900 dynas·s·cm<span class="elsevierStyleSup">-5</span> have a 4% mortality rate, whereas patients with a PVR between 900–1,200 dynas·s·cm<span class="elsevierStyleSup">-5</span> have a more than 10% mortality rate.<a class="elsevierStyleCrossRef" href="#bib19">19</a> In the present study, 33% of the patients had a PVR greater than 1,100 dynas·s·cm<span class="elsevierStyleSup">-5</span>. This finding confirms that patients are typically referred in an advanced stage of disease, which may explain the high mortality rate found in this center (over 17%; data reflect patients not included in this research).</p><p id="para220" class="elsevierStylePara elsevierViewall">We also found that the patients had a hemodynamically severe status and had elevated PVR and low CO. This inverse relationship was significant and confirms previously published findings.<a class="elsevierStyleCrossRef" href="#bib20">20</a></p><p id="para230" class="elsevierStylePara elsevierViewall">Previous work by Skoro-sajer et al. showed that changes in mPAP during the NO vasoreactivity test are associated with better outcomes following surgery.<a class="elsevierStyleCrossRef" href="#bib21">21</a> In our study, however, none of the patients had a positive test. Similar to our results, Ulrich et al. found positive NO vasoreactivity tests in only 6% of CTEPH patients (1∶22 patients).<a class="elsevierStyleCrossRef" href="#bib22">22</a> It is possible that an increased number of patients could help explain the true significance of the NO vasoreactivity test in the prognosis for patients being submitted to PTE.</p><p id="para240" class="elsevierStylePara elsevierViewall">It was surprising to observe that the POAP was elevated in 12 patients, revealing the association of a postcapillary component. It has been hypothesized that CTEPH may be related to left ventricle diastolic dysfunction due to septum compression and hypertrophy caused by increased RV pressure or decreased LV filling.<a class="elsevierStyleCrossRefs" href="#bib23">23,24</a></p><p id="para250" class="elsevierStylePara elsevierViewall">In addition, BNP or NT-proBNP serum levels have been used as markers of ventricular dysfunction in left heart disease and PAH.<a class="elsevierStyleCrossRefs" href="#bib25">25–27</a> Nagaya et al.<a class="elsevierStyleCrossRef" href="#bib28">28</a> evaluated BNP serum levels in 34 CTEPH patients before and after PTA and found a significant correlation between BNP serum levels and PVR before and after surgery. Reesink et al.<a class="elsevierStyleCrossRef" href="#bib29">29</a> showed findings consistent with those of Nagaya et al., and the present study also showed that BNP is significantly correlated with PVR and has a trend to correlate with CO. These results suggest that BNP is a marker of severity in CTEPH, as observed in other studies.<a class="elsevierStyleCrossRefs" href="#bib26">26–28</a></p><p id="para260" class="elsevierStylePara elsevierViewall">Hematological disorders are risk factors for CTEPH; however, the prevalence of these disorders is not high.<a class="elsevierStyleCrossRefs" href="#bib30">30,31</a> Wolf et al. showed that the frequency of antiphospholipid antibodies in CTEPH was 20% in a population of 116 patients,<a class="elsevierStyleCrossRef" href="#bib32">32</a> similar to that found in our data.</p><p id="para270" class="elsevierStylePara elsevierViewall">The current study is not without limitations. For instance, our sample size was very small, part of our data was collected retrospectively, and our patients were not evaluated after PTE.</p></span><span id="cesec130" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle190">CONCLUSIONS</span><p id="para280" class="elsevierStylePara elsevierViewall">The CTEPH patients evaluated for PTE were predominantly female. The patients had a clinically and hemodynamically severe status and had elevated BNP serum levels. The prevalence of schistosomiasis and hematological disorders was low (less than 10%).</p><p id="para290" class="elsevierStylePara elsevierViewall">These findings lead us to deduce that patients arrive at our specialized center with a specific and advanced disease. We therefore emphasize the importance of an early and precise diagnosis to improve the survival of CTEPH patients by referring them before they reach an advanced stage.</p></span></span>" "textoCompletoSecciones" => array:1 [ "secciones" => array:8 [ 0 => array:2 [ "identificador" => "xpalclavsec1581418" "titulo" => "KEYWORDS" ] 1 => array:2 [ "identificador" => "cesec10" "titulo" => "INTRODUCTION" ] 2 => array:3 [ "identificador" => "cesec20" "titulo" => "METHODOLOGY" "secciones" => array:4 [ 0 => array:2 [ "identificador" => "cesec30" "titulo" => "Clinical and functional evaluation" ] 1 => array:2 [ "identificador" => "cesec40" "titulo" => "Hemodynamic measurements and acute vasodilator testing" ] 2 => array:2 [ "identificador" => "cesec50" "titulo" => "Laboratory tests" ] 3 => array:2 [ "identificador" => "cesec60" "titulo" => "Statistical analysis" ] ] ] 3 => array:3 [ "identificador" => "cesec70" "titulo" => "RESULTS" "secciones" => array:4 [ 0 => array:2 [ "identificador" => "cesec80" "titulo" => "Patients" ] 1 => array:2 [ "identificador" => "cesec90" "titulo" => "Hemodynamic measurements" ] 2 => array:2 [ "identificador" => "cesec100" "titulo" => "As expected, linear regression revealed a direct relation between CO and PVR (Figure 2)" ] 3 => array:2 [ "identificador" => "cesec110" "titulo" => "Laboratory findings" ] ] ] 4 => array:2 [ "identificador" => "cesec120" "titulo" => "DISCUSSION" ] 5 => array:2 [ "identificador" => "cesec130" "titulo" => "CONCLUSIONS" ] 6 => array:2 [ "identificador" => "xack638837" "titulo" => "ACKNOWLEDGMENT" ] 7 => array:1 [ "titulo" => "REFERENCES" ] ] ] "pdfFichero" => "main.pdf" "tienePdf" => true "fechaRecibido" => "2010-06-16" "fechaAceptado" => "2010-08-26" "PalabrasClave" => array:1 [ "en" => array:1 [ 0 => array:4 [ "clase" => "keyword" "titulo" => "KEYWORDS" "identificador" => "xpalclavsec1581418" "palabras" => array:5 [ 0 => "Chronic Thromboembolic Pulmonary Hypertension" 1 => "Pulmonary Arterial Hypertension" 2 => "Pulmonary Thromboendarterectomy" 3 => "Pulmonary Hemodynamics" 4 => "Schistosomiasis" ] ] ] ] "tieneResumen" => true "resumen" => array:1 [ "en" => array:2 [ "resumen" => "<span id="ceabs10" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle10">INTRODUCTION:</span><p id="spara80" class="elsevierStyleSimplePara elsevierViewall">Chronic thromboembolic pulmonary hypertension is a disease affecting approximately 4,000 people per year in the United States. The incidence rate in Brazil, however, is unknown. The estimated survival for patients with chronic thromboembolic pulmonary hypertension without treatment is approximately three years. Pulmonary thromboendarterectomy for select patients is a potentially curative procedure when correctly applied. In Brazil, the clinical and hemodynamic profiles of chronic thromboembolic pulmonary hypertension patients have yet to be described.</p></span> <span id="ceabs20" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle20">OBJECTIVES:</span><p id="spara90" class="elsevierStyleSimplePara elsevierViewall">To evaluate the clinical and hemodynamic characteristics of chronic thromboembolic pulmonary hypertension patients scheduled for pulmonary thromboendarterectomy in a referral center for chronic thromboembolic pulmonary hypertension treatment in Brazil.</p></span> <span id="ceabs30" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle30">METHODS:</span><p id="spara100" class="elsevierStyleSimplePara elsevierViewall">From December 2006 to November 2009, patients were evaluated and scheduled for pulmonary thromboendarterectomy. The subjects were classified according to gender, age and functional class and were tested for thrombofilia and brain natriuretic peptide levels.</p></span> <span id="ceabs40" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle40">RESULTS:</span><p id="spara110" class="elsevierStyleSimplePara elsevierViewall">Thirty-five consecutive chronic thromboembolic pulmonary hypertension patients were evaluated. Two patients tested positive for schistosomiasis, and 31 were enrolled in the study (19 female, 12 male). The majority of patients were categorized in functional classes III and IV. Hemodynamic data showed a mean pulmonary vascular resistance (PVR) of 970.8 ± 494.36 dynas·s·cm<span class="elsevierStyleSup">-5</span> and a low cardiac output of 3.378 ± 1.13 L/min. Linear regression revealed a direct relation between cardiac output and pulmonary vascular resistance. Paradoxical septal movement was strongly correlated with pulmonary vascular resistance and cardiac output (p = 0.001). <span class="elsevierStyleItalic">Brain natriuretic peptide</span> serum levels were elevated in 19 of 27 patients.</p></span> <span id="ceabs50" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="cestitle50">CONCLUSIONS:</span><p id="spara120" class="elsevierStyleSimplePara elsevierViewall">In a referral center for pulmonary hypertension in Brazil, chronic thromboembolic pulmonary hypertension patients evaluated for pulmonary thromboendarterectomy had a hemodynamically severe status and had elevated <span class="elsevierStyleItalic">brain natriuretic peptide</span> serum levels. There was a predominance of females in our cohort, and the prevalence of hematological disorders and schistosomiasis was low (less than 10%).</p></span>" "secciones" => array:5 [ 0 => array:2 [ "identificador" => "ceabs10" "titulo" => "INTRODUCTION:" ] 1 => array:2 [ "identificador" => "ceabs20" "titulo" => "OBJECTIVES:" ] 2 => array:2 [ "identificador" => "ceabs30" "titulo" => "METHODS:" ] 3 => array:2 [ "identificador" => "ceabs40" "titulo" => "RESULTS:" ] 4 => array:2 [ "identificador" => "ceabs50" "titulo" => "CONCLUSIONS:" ] ] ] ] "multimedia" => array:5 [ 0 => array:7 [ "identificador" => "fig1-cln_65p1155" "etiqueta" => "Figure 1" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr1.jpeg" "Alto" => 365 "Ancho" => 498 "Tamanyo" => 16637 ] ] "descripcion" => array:1 [ "en" => "<p id="spara10" class="elsevierStyleSimplePara elsevierViewall">A contrast-enhanced spiral CT scan showing an eccentric filling defect along the lateral margin of the right pulmonary artery. The patient was a 53-year-old male with schistosomiasis, pulmonary hypertension and lung vessel remodeling.</p>" ] ] 1 => array:7 [ "identificador" => "fig2-cln_65p1155" "etiqueta" => "Figure 2" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr2.jpeg" "Alto" => 380 "Ancho" => 478 "Tamanyo" => 10998 ] ] "descripcion" => array:1 [ "en" => "<p id="spara20" class="elsevierStyleSimplePara elsevierViewall">Linear regression of CO and PVR.</p>" ] ] 2 => array:7 [ "identificador" => "fig3-cln_65p1155" "etiqueta" => "Figure 3" "tipo" => "MULTIMEDIAFIGURA" "mostrarFloat" => true "mostrarDisplay" => false "figura" => array:1 [ 0 => array:4 [ "imagen" => "gr3.jpeg" "Alto" => 377 "Ancho" => 478 "Tamanyo" => 10320 ] ] "descripcion" => array:1 [ "en" => "<p id="spara30" class="elsevierStyleSimplePara elsevierViewall">Correlation between PVR and PSM.</p>" ] ] 3 => array:7 [ "identificador" => "t1-cln_65p1155" "etiqueta" => "Table 1" "tipo" => "MULTIMEDIATABLA" "mostrarFloat" => true "mostrarDisplay" => false "tabla" => array:3 [ "leyenda" => "<p id="spara50" class="elsevierStyleSimplePara elsevierViewall">RVSP: right ventricle systolic pressure; EF: ejection fraction; PSM: paradoxical septal motion.</p>" "tablatextoimagen" => array:1 [ 0 => array:1 [ "tabla" => array:1 [ 0 => """ <table border="0" frame="\n \t\t\t\t\tvoid\n \t\t\t\t" class=""><tbody title="tbody"><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="top">Patients (n) \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top">31 \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="top">Gender (F: M) (n) \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top">19: 12 \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="top">Age, years<a class="elsevierStyleCrossRef" href="#tfn2-cln_65p1155">∗</a> \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top">51.5 ± 13 \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="top">6MWT, meters<a class="elsevierStyleCrossRef" href="#tfn2-cln_65p1155">∗</a> \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top">346.9 ± 121.3 \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="top">Functional Class WHO (I–II): (III–IV) (n) \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top">10: 18 \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="top"><span class="elsevierStyleBold">Ecocardiogram findings</span> \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="top"> \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="top">RVSP, mmHg (n = 28)<a class="elsevierStyleCrossRef" href="#tfn2-cln_65p1155">∗</a> \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top">83.6 ± 25.2 \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="top">EF, % (n = 30)<a class="elsevierStyleCrossRef" href="#tfn2-cln_65p1155">∗</a><a class="elsevierStyleCrossRef" href="#tfn3-cln_65p1155">#</a> \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top">0.67 ± 0.06 \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="top">PSM (yes: no) (n = 27) \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="center" valign="top">18: 9 \t\t\t\t\t\t\n \t\t\t\t</td></tr></tbody></table> """ ] ] ] "notaPie" => array:2 [ 0 => array:3 [ "identificador" => "tfn2-cln_65p1155" "etiqueta" => "∗" "nota" => "<p class="elsevierStyleNotepara" id="cenpara10">Data shown as the mean ± SD.</p>" ] 1 => array:3 [ "identificador" => "tfn3-cln_65p1155" "etiqueta" => "#" "nota" => "<p class="elsevierStyleNotepara" id="cenpara20">One patient had a normal EF, but the percentage was not calculated.</p>" ] ] ] "descripcion" => array:1 [ "en" => "<p id="spara40" class="elsevierStyleSimplePara elsevierViewall">Baseline patient characteristics.</p>" ] ] 4 => array:7 [ "identificador" => "t2-cln_65p1155" "etiqueta" => "Table 2" "tipo" => "MULTIMEDIATABLA" "mostrarFloat" => true "mostrarDisplay" => false "tabla" => array:2 [ "leyenda" => "<p id="spara70" class="elsevierStyleSimplePara elsevierViewall">CO: Cardiac output; sPAP: systolic pulmonary artery pressure; dPAP: diastolic pulmonary artery pressure; mPAP: mean pulmonary artery pressure; PAOP: pulmonary artery occlusion pressure; PVR: pulmonary vascular resistance. Data shown as the mean ± SD.</p>" "tablatextoimagen" => array:1 [ 0 => array:1 [ "tabla" => array:1 [ 0 => """ <table border="0" frame="\n \t\t\t\t\tvoid\n \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="left" valign="bottom" scope="col" style="border-bottom: 2px solid black">(n = 29) \t\t\t\t\t\t\n \t\t\t\t\t\t</th><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="center" valign="bottom" scope="col" style="border-bottom: 2px solid black">Baseline \t\t\t\t\t\t\n \t\t\t\t\t\t</th><th class="td" title="\n \t\t\t\t\ttable-head\n \t\t\t\t " align="center" valign="bottom" scope="col" style="border-bottom: 2px solid black">After NO inhalation \t\t\t\t\t\t\n \t\t\t\t\t\t</th></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="top">CO (L/min) \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="char" valign="top">3.378 ± 1.13 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="char" valign="top">3.57 ± 0.87 \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="top">sPAP (mmHg) \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="char" valign="top">89.41 ± 26.32 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="char" valign="top">83.36 ± 25.15 \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="top">dPAP (mmHg) \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="char" valign="top">32.89 ± 10.03 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="char" valign="top">30.71 ± 12.5 \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="top">mPAP (mmHg) \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="char" valign="top">54.98 ± 15.33 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="char" valign="top">50.14 ± 14.05 \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="top">PAOP (mmHg) \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="char" valign="top">15.86 ± 10.09 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="char" valign="top">13.33 ± 4.84 \t\t\t\t\t\t\n \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="left" valign="top">PVR (dynas·s·cm<span class="elsevierStyleSup">-5</span>) \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="char" valign="top">970.8 ± 494,36 \t\t\t\t\t\t\n \t\t\t\t</td><td class="td" title="\n \t\t\t\t\ttable-entry\n \t\t\t\t " align="char" valign="top">894,83 ± 439,04 \t\t\t\t\t\t\n \t\t\t\t</td></tr></tbody></table> """ ] ] ] ] "descripcion" => array:1 [ "en" => "<p id="spara60" class="elsevierStyleSimplePara elsevierViewall">Hemodynamic variables at baseline and after vasoreactivity testing.</p>" ] ] ] "bibliografia" => array:2 [ "titulo" => "REFERENCES" "seccion" => array:1 [ 0 => array:2 [ "identificador" => "cebibsec10" "bibliografiaReferencia" => array:32 [ 0 => array:3 [ "identificador" => "bib1" "etiqueta" => "1" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Pulmonary Arterial Hypertension" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:2 [ 0 => """ KM Chin \n \t\t\t\t\t\t\t\t """ 1 => """ L Rubin \n \t\t\t\t\t\t\t\t """ ] ] ] ] ] "host" => array:2 [ 0 => array:1 [ "Revista" => array:5 [ "tituloSerie" => "J Am Coll Cardiol" "fecha" => "2008" "volumen" => "51" "paginaInicial" => "1527" "paginaFinal" => "1538" ] ] 1 => array:1 [ "WWW" => array:1 [ "link" => "10.1016/j.jacc.2008.01.024" ] ] ] ] ] ] 1 => array:3 [ "identificador" => "bib2" "etiqueta" => "2" "referencia" => array:1 [ 0 => array:2 [ "contribucion" => array:1 [ 0 => array:2 [ "titulo" => "Qualidade de vida antes e após tromboendarterectomia pulmonar" "autores" => array:1 [ 0 => array:2 [ "etal" => false "autores" => array:3 [ 0 => """ PR Genta \n \t\t\t\t\t\t\t\t """ 1 => """ FB Jatene \n \t\t\t\t\t\t\t\t """ 2 => """ M Terra-Filho \n \t\t\t\t\t\t\t\t """ ] ] ] ] ] "host" => array:2 [ 0 => array:1 [ "Revista" => array:5 [ "tituloSerie" => "J Bras Pneumol" "fecha" => "2005" "volumen" => "31" "paginaInicial" => "48" "paginaFinal" => "51" ] ] 1 => array:1 [ "WWW" => array:1 [ "link" 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