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- W2023705654 abstract "The inducibility of ventricular tachycardia (VT) and fibrillation (VF) is variable in healed myocardial infarction (MI) in the dog. To better understand the electrophysiologic basis for these arrhythmias, MI was produced in dogs by ligating the left anterior descending artery. One week later, epicardial mapping was performed with the dog in sinus rhythm using a hand-held bipolar electrode. Transmural mapping was performed with the dog in sinus rhythm with 4 pairs of bipolar electrodes mounted on a #14 needle. Ventricular arrhythmias were induced by the S1S2S3 technique or 3- to 5-beat burst pacing at twice diastolic threshold. Only VF could be induced in 11 dogs, while sustained VT was induced in 6 dogs. Significantly more marked and more extensive delay in activation was seen both in the epicardium and transmurally in dogs with VT than in dogs with VF. In addition, dogs with VT had morphologic evidence of a large transmural MI, whereas dogs with VF had only a subendocardial MI. It is concluded that inducible sustained VT in the dog is usually associated with a large transmural MI and an activation sequence in sinus rhythm characterized by an extensive area of marked delay in activation. This activation pattern in sinus rhythm presumably is necessary to provide the underlying electrophysiologic milieu for sustained reentry." @default.
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- W2023705654 date "1985-06-01" @default.
- W2023705654 modified "2023-09-27" @default.
- W2023705654 title "Sinus rhythm mapping in healed experimental myocardial infarction: contrasting activation patterns for inducing ventricular tachycardia versus fibrillation" @default.
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- W2023705654 doi "https://doi.org/10.1016/0002-9149(85)90980-4" @default.
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