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La desfibrilación ventricular con formas de onda trifásicas.

J Huang1, B H KenKnight, D L Rollins

  • 1Cardiac Rhythm Management Laboratory, Division of Cardiovascular Diseases, Department of Medicine, Department of Physiology, and Department of Biomedical Engineering, University of Alabama at Birmingham, Birmingham, AL, USA.

Circulation
|March 22, 2000
PubMed
Resumen
Este resumen es generado por máquina.

Las formas de onda de desfibrilación trifásica pueden ser más eficientes que las bifásicas, especialmente con una inclinación del 80% y polaridad específica del electrodo. Sin embargo, su superioridad no es consistente en todas las configuraciones y tamaños de condensadores.

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Área de la Ciencia:

  • Investigación cardiovascular Investigación cardiovascular Investigación cardiovascular Investigación cardiovascular Investigación cardiovascular
  • Ingeniería Biomédica Ingeniería Biomédica.
  • Electrofisiología y electrofisiología.

Sus antecedentes:

  • Se supone que las formas de onda trifásicas causan menos lesiones en el miocardio que las formas de onda bifásicas.
  • Este estudio investiga los umbrales de desfibrilación (DFT) de las formas de onda trifásicas frente a las bifásicas.

Objetivo del estudio:

  • Para comparar la eficacia de la desfibrilación de las formas de onda trifásicas y bifásicas.
  • Para evaluar el impacto de la inclinación de la forma de onda, las duraciones de fase y la polaridad del electrodo en los DFT.

Principales métodos:

  • Los umbrales de desfibrilación se determinaron en cerdos utilizando sistemas de plomo transvenoso.
  • Tanto las formas de onda trifásicas como las bifásicas se probaron con diferentes tamaños de condensadores (300-microF y 140-microF) e inclinaciones.
  • El efecto de la polaridad del electrodo (anodal vs. catodal) en la DFT se evaluó para cada forma de onda.

Principales resultados:

  • Las formas de onda trifásicas con una inclinación del 80% y la polaridad específica del electrodo demostraron DFT significativamente más bajos en comparación con las formas de onda bifásicas que utilizan un condensador de 300 microF.
  • En otro grupo, las formas de onda trifásicas con 49% y 56% de inclinación mostraron menores requerimientos de energía que las formas de onda bifásicas con inclinaciones similares, pero solo para la fase anodal 1.
  • La polaridad del electrodo influyó significativamente en el DFT para las formas de onda trifásicas en ambos grupos experimentales.

Conclusiones:

  • Ciertas formas de onda trifásicas (por ejemplo, 80% de inclinación) pueden desfibrilar de manera más eficiente que las formas de onda bifásicas con un condensador de 300 microF.
  • No se encontró que las formas de onda trifásicas fueran superiores a las formas de onda bifásicas de un condensador de 140 microF.
  • La efectividad de la desfibrilación trifásica depende de las duraciones de fase específicas y la polaridad del electrodo.