Camus JM, Risk RM, Forteza E, Ramírez AJ, Cabrera FEI

Idioma: Español
Referencias bibliográficas: 23
Paginas: 68-74
Archivo PDF: 108.22 Kb.

RESUMEN

La contrapulsación intra-aórtica es la técnica de asistencia circulatoria más usada en pacientes con insuficiencia cardiaca refractaria al tratamiento farmacológico. Este trabajo presenta el análisis de la actividad del sistema nervioso autónomo sobre el aparato cardiovascular durante la contrapulsación intra-aórtica convencional en un modelo animal de insuficiencia cardiaca aguda. Se registraron durante 6 minutos las señales de electrocardiografía, presión aórtica y flujo arterial pulmonar antes y durante la asistencia circulatoria mecánica, antes y después de la inducción de insuficiencia cardiaca por medio de una alta dosis de halotano. La variabilidad de la frecuencia cardiaca, presión aórtica media, flujo pulmonar medio y sensibilidad del control barorreflejo se analizaron en el dominio del tiempo y de la frecuencia una vez finalizada la sesión experimental. No se observaron diferencias significativas causadas por la asistencia mecánica con contrapulsación intra-aórtica, esta ausencia de cambios podría reflejar que esta técnica mejora la hemodinámica de las ovejas con insuficiencia cardiaca sin provocar modificaciones significativas en la variabilidad de la presión aórtica, frecuencia cardiaca y sensibilidad del control barorreflejo.

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