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Pruebas de estrés de la ecocardiografía de dipiridamolo en pacientes hipertensos. Objetivos y herramientas
A R Lucarini1, E Picano, F Lattanzi
1CNR Clinical Physiology Institute, University of Pisa, Italy.
Circulation
|May 1, 1991
Resumen
La hipertensión arterial afecta la reserva de flujo coronario a través de la enfermedad de la arteria coronaria, la hipertrofia ventricular izquierda o la enfermedad microvascular. Los marcadores diagnósticos difieren para cada uno, con la ecocardiografía y los cambios en el ECG durante la prueba de dipiridamolo que ofrecen perspectivas distintas.
Área de la Ciencia:
- Cardiología Cardiología.
- Investigación de la Hipertensión Investigación de la Hipertensión
- Imágenes de diagnóstico por imágenes.
Sus antecedentes:
- La hipertensión arterial puede reducir la reserva de flujo coronario a través de múltiples vías, incluida la enfermedad arterial coronaria, la hipertrofia ventricular izquierda y la disfunción microvascular.
- Un diagnóstico efectivo requiere marcadores distintos adaptados a cada uno de estos objetivos hipertensivos.
- Comprender estos mecanismos es crucial para la gestión del riesgo cardiovascular en pacientes hipertensos.
Objetivo del estudio:
- Investigar la utilidad de marcadores diagnósticos específicos para diferenciar los mecanismos de reducción de la reserva de flujo coronario en la hipertensión arterial.
- Evaluar la fiabilidad de la ecocardiografía y la electrocardiografía bidimensionales durante la infusión de dipiridamolo en individuos hipertensos.
Principales métodos:
- Utilizó ecocardiografía bidimensional durante la infusión de dipyridamole para evaluar la dissinergia transitoria como un marcador de la enfermedad de la arteria coronaria.
- Se analizó la depresión del segmento ST inducida por dipiridamolo en relación con la enfermedad coronaria evaluada angiográficamente, la hipertrofia ventricular izquierda y la enfermedad microvascular.
- Encontros electrocardiográficos correlacionados con evaluaciones ecocardiográficas y mediciones de la reserva de flujo coronario durante el ritmo.
Principales resultados:
- La dissinergia transitoria en la ecocardiografía identifica de manera confiable la enfermedad de la arteria coronaria tanto en pacientes normotensos como hipertensivos.
- La depresión del segmento ST inducida por dipiridamolo en pacientes hipertensos a menudo ocurre sin una enfermedad arterial coronaria significativa y puede estar relacionada con la hipertrofia ventricular izquierda.
- La depresión del segmento ST, incluso con masa ventricular izquierda normal, se correlaciona con una reserva de flujo coronario deteriorada, lo que sugiere una enfermedad microvascular.
Conclusiones:
- La ecocardiografía detecta eficazmente la enfermedad de las arterias coronarias en individuos hipertensos.
- Los cambios electrocardiográficos durante la prueba de dipiridamol en la hipertensión pueden indicar hipertrofia ventricular izquierda o enfermedad microvascular, incluso en ausencia de enfermedad coronaria obstructiva.
- La importancia clínica de los cambios electrocardiográficos ecocardiográficamente silenciosos en la hipertensión requiere una investigación adicional para determinar su papel como marcadores de daño miocárdico temprano.
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