Methods Monitored by 3-lead and 12 -lead dynamic Electrocardiograms (DCG). Analyzed the changes of heart rate with parameters of ventricular rate and hourly frequency gram.

• 方法：3导、12导同步动态心电图(DCG)检测，采用心室率各参数和24h每小时平均心室率的频率趋势图分析持续性AF的HR波动情况；