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Updated: Jun 8, 2026

Oxygenation-sensitive Cardiac MRI with Vasoactive Breathing Maneuvers for the Non-invasive Assessment of Coronary Microvascular Dysfunction

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Disfunción microvascular en las oclusiones coronarias totales crónicas.

G S Werner¹, M Ferrari, B M Richartz

¹Clinic for Internal Medicine III, Friedrich-Schiller-University Jena, Erlanger Allee 101, Jena, Germany. gerald.werner@med.uni-jena.de

|September 6, 2001

Resumen

Este resumen es generado por máquina.

La disfunción microvascular afecta a más de la mitad de los pacientes con oclusiones coronarias totales crónicas (OCT), particularmente a los que padecen diabetes o hipertensión. La combinación de la reserva de velocidad de flujo coronario (CFVR) y la reserva de flujo fraccionado (FFR) es crucial para una evaluación precisa después de la angioplastia TCO.

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Área de la Ciencia:

Medicina Cardiovascular La medicina cardiovascular es una especialidad de la salud.
Cardiología Intervencionista Cardiología intervencionista.
Enfermedad de las arterias coronarias Enfermedad de las arterias coronarias

Sus antecedentes:

La disfunción microvascular se caracteriza por una reducción de la reserva de flujo coronario sin estenosis epicárdica.
Este estudio investigó la prevalencia y el impacto de la disfunción microvascular en las oclusiones coronarias totales crónicas (OCT).

Objetivo del estudio:

Para determinar la prevalencia de la disfunción microvascular en las OCT.
Evaluar la relación entre la disfunción microvascular y la función miocárdica regional.
Para evaluar la utilidad de la reserva de velocidad de flujo coronario (CFVR) y la reserva de flujo fraccionado (FFR) en TCOs.

Principales métodos:

Recanalización y colocación de stents de TCO en 42 pacientes.
Reserva de velocidad de flujo coronario (CFVR) medida por Doppler intracoronario.
Reserva de flujo fraccionado (FFR) registrada en un subconjunto de 27 pacientes.
CFVR reevaluado después de 24 horas en 21 pacientes.

Principales resultados:

El 55% de los pacientes exhibieron reducción de la VFCF (<2,0).
En un subgrupo, el 52% mostró reducción de la VFC con un FFR no significativo (>=0,75), lo que indica una disfunción microvascular.
La disfunción microvascular fue más frecuente en pacientes con diabetes y/o hipertensión.
CFVR y FFR estaban pobremente correlacionados (r=0.03).

Conclusiones:

La disfunción microvascular es común en las OCT (55%), independientemente de la función regional del miocardio.
La diabetes y la hipertensión están asociadas con un aumento de la disfunción microvascular.
Ni CFVR ni FFR por sí solos son suficientes para evaluar los resultados de la angioplastia en TCO; se recomienda una evaluación combinada.