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Inicio Hipertensión y Riesgo Vascular Hypertensive emergency secondary to atropine
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Vol. 41. Issue 1.
Pages 58-61 (January - March 2024)
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Vol. 41. Issue 1.
Pages 58-61 (January - March 2024)
Clinical case
Hypertensive emergency secondary to atropine
Emergencia hipertensiva secundaria a atropina
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5
P.R. Carvalho
Corresponding author
pedro09carvalho@gmail.com

Corresponding author.
, F. Gonçalves, P. Magalhães, J.I. Moreira
Cardiology Department, Centro Hospitalar de Trás-os-Montes e Alto Douro, Hospital of Vila Real, Vila Real, Portugal
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Abstract

Atropine, a competitive antagonist of acetylcholine muscarinic receptors, is commonly used to treat severe bradycardia by blocking parasympathetic activity. We present a rare case of hypertensive emergency following atropine administration, with only one previous report in the literature.

A 78-year-old woman with essential hypertension and hypercholesterolemia was admitted to the cardiac intensive care unit for non-ST segment elevation myocardial infarction. During coronary angiography, an occlusion of the right coronary artery was identified. While removing the diagnostic catheter through the right radial artery, the patient experienced intense pain and discomfort, accompanied by a vasovagal reflex characterized by bradycardia and hypotension. Intravenous atropine (0.5mg) was administered, leading to a rapid rise in heart rate with frequent ventricular ectopy. Subsequently, a progressive and exaggerated elevation in arterial blood pressure occurred, peaking at 294/121mmHg approximately 10min after atropine administration. The patient developed hypertensive acute pulmonary edema, successfully treated with intravenous nitroglycerine (10mg) and furosemide (60mg). Blood pressure normalized after approximately 14min.

The exact mechanism of atropine-induced hypertensive emergency remains unknown. While hypertensive emergencies with atropine are exceedingly rare, healthcare professionals should be aware of this potential effect and be prepared for prompt intervention.

Keywords:
Atropine
Side effects
Hypertensive emergency
Resumen

La atropina, un antagonista competitivo de los receptores muscarínicos de acetilcolina, se utiliza comúnmente para tratar la bradicardia severa al bloquear la actividad parasimpática. Presentamos un caso raro de emergencia hipertensiva después de la administración de atropina, con solo un informe previo en la literatura.

Una mujer de 78 años con hipertensión esencial e hipercolesterolemia fue ingresada en la unidad de cuidados intensivos cardíacos por infarto agudo de miocardio sin elevación del segmento ST. Durante la angiografía coronaria, se identificó una oclusión de la arteria coronaria derecha. Mientras se retiraba el catéter diagnóstico a través de la arteria radial derecha, la paciente experimentó un intenso dolor y malestar, acompañado de un reflejo vasovagal caracterizado por bradicardia e hipotensión. Se administró atropina intravenosa (0,5 mg), lo que provocó un rápido aumento de la frecuencia cardíaca con frecuente ectopia ventricular. Posteriormente, ocurrió una elevación progresiva y exagerada de la presión arterial, alcanzando un máximo de 294/121 mmHg aproximadamente 10 minutos después de la administración de atropina. La paciente desarrolló edema pulmonar agudo hipertensivo, tratado con éxito con nitroglicerina intravenosa (10 mg) y furosemida (60 mg). La presión arterial se normalizó después de aproximadamente 14 minutos.

El mecanismo exacto de la emergencia hipertensiva inducida por atropina sigue siendo desconocido. Aunque las emergencias hipertensivas con atropina son excepcionalmente raras, los profesionales de la salud deben estar al tanto de este efecto potencial y estar preparados para intervenir rápidamente.

Palabras clave:
Atropina
Emergencia hipertensiva
Efectos secundarios

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