Mechanisms of defibrillation.

Mechanisms of defibrillation.
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DOI:
10.1146/annurev-bioeng-070909-105305
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发表时间:
2010-08-15
影响因子:
9.7
通讯作者:
Ideker RE
Ideker RE
中科院分区:
工程技术1区
文献类型:
--
作者:
Dosdall DJ;Fast VG;Ideker RE

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几十年来,电击一直是治疗室颤的有效方法之一。随着电和光学标测技术、组织学和计算机模拟技术的进步,除颤的机制现已浮出水面。在这篇综述中,我们讨论了最近的工作,证明了除颤的各种机制。在细胞水平上,膜去极化和电穿孔影响除颤结果。细胞束和胶原间隔是次要来源,在远离电击电极的部位造成虚拟电极。在全心水平上,激波场的梯度和临界点决定了休克是否成功或再入是否导致纤颤的开始和持续。
Electrical shock has been the one effective treatment for ventricular fibrillation for several decades. With the advancement of electrical and optical mapping techniques, histology, and computer modeling, the mechanisms responsible for defibrillation are now coming to light. In this review, we discuss recent work that demonstrates the various mechanisms responsible for defibrillation. On the cellular level, membrane depolarization and electroporation affect defibrillation outcome. Cell bundles and collagenous septae are secondary sources and cause virtual electrodes at sites far from shocking electrodes. On the whole-heart level, shock field gradient and critical points determine whether a shock is successful or whether reentry causes initiation and continuation of fibrillation.
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