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Deterioro de la eficiencia ventilatoria en la insuficiencia cardíaca: impacto pronóstico
F X Kleber1, G Vietzke, K D Wernecke
1Medizinische Klinik und Poliklinik I, Universitätsklinikum Charité, Arbeitsgruppe Medizinische Biometrie, Humboldt-Universität zu Berlin, Berlin, Germany. franz-xaverk@ukb.de
Circulation
|June 22, 2000
Resumen
La pendiente VE versus V (((CO(2)) predice efectivamente la supervivencia en pacientes con insuficiencia cardíaca congestiva (ICC). Una pendiente más baja indica una mejor supervivencia libre de eventos, superando el VO{2) max como marcador pronóstico.
Área de la Ciencia:
- Cardiología Cardiología.
- Medicina Pulmonar La medicina pulmonar es el tratamiento de las enfermedades pulmonares.
- Fisiología del ejercicio Fisiología del ejercicio
Sus antecedentes:
- La disminución de la eficiencia ventilatoria en la insuficiencia cardíaca congestiva (ICC) está relacionada con los síntomas y la disnea.
- La comprensión de los marcadores de pronóstico es crucial para el manejo de los pacientes con CHF.
Objetivo del estudio:
- Para evaluar la importancia pronóstica de la eficiencia ventilatoria, específicamente la pendiente VE versus V (((CO ((2)), en pacientes con insuficiencia cardíaca congestiva.
- Para comparar el poder predictivo de la pendiente VE versus V (((CO(2)) con otros parámetros establecidos como VO (((2) max.
Principales métodos:
- Las pruebas de ejercicio cardiopulmonar se llevaron a cabo en 142 pacientes con ECC y 101 controles sanos.
- La eficiencia de los ventiladores se cuantificó como la pendiente de la relación VE versus V (((CO ((2)).
- El valor pronóstico se evaluó mediante el seguimiento de eventos adversos (muerte, trasplante, implantación del dispositivo).
Principales resultados:
- La pendiente VE versus V (((CO(2)) fue el predictor más fuerte de supervivencia libre de eventos entre los parámetros evaluados.
- Los pacientes con una pendiente VE versus V (((CO(2)) ≤130% de los valores normales tuvieron una supervivencia sin eventos de 1 año significativamente mejor (88,3%) en comparación con aquellos con una pendiente >130% (54,7%).
- Este parámetro demostró ser más impactante que el VO2max, la clase NYHA, el LVEF, la capacidad pulmonar total y la edad.
Conclusiones:
- La pendiente VE versus V (((CO(2)) es un parámetro pronóstico muy eficaz en CHF.
- Esta medida es más sencilla de obtener que las métricas de capacidad máxima de ejercicio.
- La pendiente VE versus V (((CO(2)) tiene una mayor importancia pronóstica que VO (((2) max para predecir los resultados en CHF.
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