在 in situ 猪心脏中心室动期间的恢复性质

在 in situ 猪心脏中心室动期间的恢复性质

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Standardized Model of Ventricular Fibrillation and Advanced Cardiac Life Support in Swine

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Standardized Model of Ventricular Fibrillation and Advanced Cardiac Life Support in Swine

Published on: January 30, 2020

Jian Huang¹, Xiaohong Zhou, William M Smith

¹Cardiac Rhythm Management Laboratory, Division of Cardiovascular Disease, Department of Medicine, University of Alabama at Birmingham, Volker Hall B140, 1530 3rd Ave S, Birmingham, AL 35294-0019, USA. jh@crml.uab.edu

Circulation

|November 10, 2004

概括

恢复和心脏记忆同样影响心室动 (VF) 期间的动作潜能持续时间 (APD). 然而,其他未测量的因素也显著影响APD,解释了其61%的变化.

科学领域:

心血管生理学心血管生理学
电子生理学电子生理学

背景情况:

心室动 (VF) 是一种危及生命的心律失常.
动作电位持续时间 (APD) 是心脏电稳定的关键决定因素.
报销已被提议作为影响VF期间APD的一个关键因素.

研究的目的:

调查恢复和心脏记忆在VF期间对APD调节的相对贡献.
为了确定之前的透析间隔和APD在VF期间对当前APD的预测能力.

主要方法:

在诱导VF期间,从猪右心室壁获得了跨膜潜能记录.
计算了60%再极化 (APD60) 的动作潜能持续时间和透气间隔 (DI).
逐步线性回归分析了APD60与之前的DI和APD之间的关系.

主要成果:

之前的透析间隔 (DI(n-1)) 和之前的APD60 (APD60(n-1)) 是目前APD60.0的最常见预测因素.
分别在70%和71%的分析间隔中,DI (n-1) 和APD (n-1) 是显著的预测因素.
回归模型只解释了在VF期间APD变化的39%.

结论:

归还 (通过DI ((n-1)) 和心脏记忆 (通过APD60 ((n-1)) 在确定VF期间的APD中发挥着重要的,同样重要的作用.
额外的非特征因素对于VF期间的APD调节至关重要,占大多数变化的原因.

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