动态心电图检测射频消融术前、后过早搏动的意义

The Significance of Cardiac Premature Contraction Detected With Dynamic Electrocardiogram Before and After Radiofrequency Catheter Ablation

对９０例病人分别于射频导管消融（ＲＦＣＡ）前、后记录２４小时动态心电图，用计算机自动检测房性早搏（简称房早）及室性早搏（简称室早），并作定量分析，探讨动态心电图检测ＲＦＣＡ前、后过早搏动的临床意义。结果显示各组ＲＦＣＡ前、后室早数量均无明显改变。在心房侧放电消融，当消融靶点数≥５处、放电时间≥２００ｓ时，ＲＦＣＡ后房早数有所增加（４７．６５±５３．１５次／２４小时ｖｓ４０．２５±５１．６０次／２４小时），但无统计学意义（转换为对数后进行统计处理，Ｐ＞０．０５）。提示射频电流对心肌的损伤作用轻微，一般不会形成新的心律失常病灶。

To investigate the clinical significance of cardiac premature contraction detected with dynamic electrocardiogram before and after radiofrequency catheter ablation (RFCA),dynamic electrocardiogram of 90 patients was recorded before and after RFCA.The premature atrial contraction (PAC) and premature ventricular contraction (PVC) were quantitatively analysed by computer.Results:The amounts of PVC were not significant before and after RFCA.In the patients with atrium ablation (ablation site≥5 and ablation duration≥200 s),the amounts of PAC were 40.25±51.60 vs 47.65±53.15 beats/24 h respectively before and after RFCA.Though the amounts of PAC increased after RFCA,there were no significance (P>0.05).Conclusions:the radiofrequency current injury on the myocardium was slight and might not induce a new proarrhythmia site.