期刊
CIRCULATION
卷 115, 期 18, 页码 2451-2457出版社
LIPPINCOTT WILLIAMS & WILKINS
DOI: 10.1161/CIRCULATIONAHA.106.683235
关键词
arrhythmia; death, sudden; defibrillation; ischemia; myocardial infarction; revascularization; tachyarrhythmias
Sudden death is a catastrophic but unpredictable complication of coronary artery disease and is frequently the consequence of an acute ischemic event.(1-3) The efficacy of the implantable cardioverter-defibrillator (ICD) in reducing sudden cardiac death incidence is irrefutable and strongly supported by evidence from randomized trials of both primary and secondary prevention (Figure 1).(4-8) Nonetheless, the 2 neutral trials(9,10) raise intriguing and puzzling issues in regard to the temporal relationship between myocardial infarction (MI), coronary revascularization, residual myocardial ischemia, and severe left ventricular dysfunction and its impact on the mechanisms of presumed sudden cardiac death and the efficacy of the ICD. In this respect, this commentary addresses current knowledge regarding the mechanisms of death early and late after MI, limitations in our abilities to stratify risk, and analyses from the randomized trials in an attempt to reconcile the apparently paradoxical observation that the highest rate of sudden cardiac death occurs the first few weeks after MI and that the only ICD trial to address this population was neutral.(10)
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