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Arrhythmias and left ventricular function after defibrillation during acute myocardial infarction in the intact dog.

Abstract：

:The purpose of this study was to assess the recovery of the left ventricular pressure (PLV), and the incidence and type of arrhythmias after effective low-dose defibrillation (Imax = 18-70 A) in healthy hearts and in hearts with acute myocardial infarction (AMI) in the intact dog. In fifteen dogs 84 episodes of fibrillation-defibrillation were studied in the healthy heart and 53 episodes were studied in the acute phase of myocardial infarction 1/2 to 3 hours after occlusion of a part of the left anterior descending artery by a catheter technique. Time to recovery of PLV depended on duration of fibrillation (tF) and cumulative defibrillation current (I 1/2), and became critical at tF greater than 45 seconds and I 1/2 greater than 45 A. Total duration of arrhythmias due to defibrillation increased with increasing tF and I 1/2. Arrhythmias which have a relative greater chance of resulting in refibrillation or which may seriously decrease the cardiac output occurred more often with I 1/2 greater than 55 A (p less than 0.001), when 50% of episodes were followed by these arrhythmias. No differences were found in responses between the healthy heart and the heart with AMI.

journal_name

Am Heart J

journal_title

American heart journal

authors

Geuze RH,de Vente J

doi

10.1016/0002-8703(83)90195-3

subject

Has Abstract

pub_date

1983-08-01 00:00:00

pages

292-9

issue

2

eissn

0002-8703

issn

1097-6744

pii

0002-8703(83)90195-3

journal_volume

106

pub_type

杂志文章

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