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Distribución de la superficie corporal del potencial eléctrico durante la despolarización y repolarización
Circulation
|July 1, 1980
Resumen
Este estudio mapea los potenciales eléctricos de la superficie corporal durante la actividad auricular en sujetos normales. Los hallazgos revelan cambios de potencial dinámico, consistentes con la actividad del generador cardíaco de dipolo único.
Área de la Ciencia:
- Cardiología Cardiología.
- Electrofisiología y electrofisiología.
- Imágenes médicas de imágenes médicas.
Sus antecedentes:
- Existen datos limitados sobre las distribuciones isopotenciales de la superficie corporal durante la excitación y recuperación auricular.
- Comprender estas distribuciones es crucial para el diagnóstico cardíaco no invasivo.
Objetivo del estudio:
- Para documentar las distribuciones isopotenciales de la superficie corporal durante la excitación auricular y la recuperación en sujetos normales.
- Para correlacionar los patrones de potencial de la superficie corporal con la activación auricular y la repolarización.
Principales métodos:
- Mapas isopotenciales de la superficie corporal adquiridos de 40 sujetos normales.
- Distribuciones isopotenciales construidas a intervalos de 2 ms desde el inicio de la onda P hasta el inicio del QRS.
- Analizó los cambios en la distribución potencial a lo largo de la actividad auricular.
Principales resultados:
- Un máximo precordial medio izquierdo dominó la onda P temprana; los potenciales negativos estaban en la parte superior de la espalda.
- El máximo se desplazó hacia la izquierda, con potenciales negativos que se mueven precordialmente, seguido de un máximo posterior izquierdo y un mínimo medio precordial.
- El mínimo se intensificó y se mantuvo estacionario durante el segmento PR, consistente con la repolarización auricular.
Conclusiones:
- Los patrones de potenciales de superficie corporal observados se alinean con los hallazgos epicárdicos de activación auricular secuencial y repolarización.
- Los patrones únicos de máximo/mínimo apoyan un modelo de generador cardíaco equivalente de dipolo único para la actividad auricular.
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