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某家族的112例成员中15例在年轻时睡眠中发生猝死。该家族的22例成员应用体表平均心电图(SAECG)检测晚电位。探讨晚电位的出现率及其与心动过缓依赖性QT延长的相关性。应用 Lepeschkin氏法检出心动过缓依赖性QT延长9例,QT延长均出现于窦性心率低于60～80次/分时,其中6例(67%)在SAECG上记录到晚电位。而QT正常的13例中仅1例(8％)记录到晚电位(P<0.007)。晚电位阳性预测心动过缓依赖性QT
Of 112 patients in a family, 15 died of sudden onset of sleep during their young age. Twenty-two members of this family detected late potentials using body surface mean electrocardiogram (SAECG). To investigate the incidence of late potentials and their correlation with delayed bradycardia-dependent QT. Nine cases of bradycardia-dependent QT prolongation were detected by Lepeschkin’s method. QT prolongation occurred when the sinus heart rate was less than 60-80 beats / min. Six of them (67%) recorded late potentials on SAECG. Only 1 of the 13 patients with normal QT (8%) recorded late potentials (P <0.007). Late potentials positively predict bradycardia-dependent QT