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为了解24h动态心电图最快心率Q-Tc较最慢心率的延长部分(Q-Tcp)对冠心病的诊断价值,观察33例冠心病与33例正常人Q-Tc,结果冠心病最快心率Q-Tc,Q-Tcp分别为454.6±23.8ms,66.7±23.6ms,对照组为419.5±29.8ms,24.8±18.8ms两组差异有非常显著意义(P,0.01),如以Q-Tcp≥45ms为冠心病阳性标准,其敏感性为85%,特异性为91%,均