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Vol. 59. Issue 1.
Pages 55-61 (January 2007)
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Vol. 59. Issue 1.
Pages 55-61 (January 2007)
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Relación de la dilatación de la arteria braquial mediada por flujo y el índice tobillo-brazo en pacientes con enfermedad arterial periférica
The relation between brachial artery flow-mediated dilation and the ankle-brachial index in patients with peripheral arterial disease
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F.J. Medina-Maldonado
Corresponding author
fjmedina@telefonica.net

Correspondencia: Corona, 24, 6.º-B. E-28054 Madrid.
, J. de Haro-Miralles, E. Martínez-Aguilar, A. Flórez-González, J.R. March-García, F. Acín
Servicio de Angiología y Cirugía Vascular. Hospital Universitario de Getafe. Getafe, Madrid, España
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Resumen
Introducción

La medida ecográfica de la dilatación de la arteria braquial mediada por flujo (DABMF) se ha validado en nuestro laboratorio en la determinación de la disfunción endotelial en pacientes con enfermedad arterial periférica (EAP). Según nuestra experiencia, esta disfunción no es determinante de la gravedad de la enfermedad. El índice tobillo-brazo (ITB) es un marcador clásico de EAP asociado a su gravedad.

Objetivo

Determinar la relación de la DABMF y el ITB en pacientes con EAP.

Pacientes y métodos

Determinamos la DABMF y el ITB en pacientes con EAP sintomática, demostrada hemodinámica y/o angiográficamente con ITB < 0,9. Se recogen los factores de riesgo cardiovascular y los tratamientos.

Resultados

Se reclutó un total de 72 pacientes con edad de 65,36 ± 7,7 años, de los que un 27,5% presentaba isquemia crítica. La DABMF fue de 5,49 ± 0,43%; el coeficiente de correlación de Spearman es r < 0,001 (p < 0,05). No existieron diferencias estadísticamente significativas en la DABMF entre el grupo con ITB < 0,3 (percentil 5) y el de índice mayor. Tampoco existió en los valores de ITB de los grupos con DABMF mayor y menor a 1,35% (percentil 5).

Conclusiones

No existe relación directa entre el ITB y la DABMF, lo que corrobora nuestra hipótesis de que la disfunción endotelial es un factor predisponente para el desarrollo de la EAP, pero no determinante en su gravedad.

Palabras clave:
Arteriosclerosis
Dilatación braquial
Disfunción endotelial
Enfermedad arterial periférica
Índice tobillo-brazo
Ultrasonidos
Summary
Introduction

Measurement of brachial artery flow-mediated dilation (BAFMD) using ultrasonography was tested in our laboratory to determine endothelial dysfunction in patients with peripheral arterial disease (PAD). Our experience shows that this dysfunction does not determine the severity of the disease. The ankle-brachial index (ABI) is a classic marker of PAD associated with its severity.

Aim

To determine the BAFMD and the ABI in patients with PAD.

Patients and methods

The BAFMD and ABI were determined in patients with symptomatic PAD, which had been confirmed haemodynamically and/or angiographically with an ABI < 0.9. Both cardiovascular risk factors and treatments are considered.

Results

A total of 72 patients aged 65.36 ± 7.7 years were recruited for the study, 27.5% of whom had critical ischaemia. BAFMD was 5.49 ± 0.43% and the Spearman correlation coefficient was r < 0.001 (p < 0.05). No statistically significant differences were found between the BAFMD in the group with an ABI < 0.3 (percentile 5) and the one with a higher index. No significant differences were observed in the ABI values in the groups with a BAFMD above and below 1.35% (percentile 5).

Conclusions

There is no direct relation between the ABI and the BAFMD, which lends support to our hypothesis that endothelial dysfunction is a predisposing factor for the development of PAD, but does not determine its severity.

Key words:
Ankle-brachial index
Arteriosclerosis
Brachial artery dilation
Endothelial dysfunction
Peripheral arterial disease
Ultrasounds
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