显性预激射频消融术后对房室结前传功能的影响

Effect of radiofrequency catheter ablation of manifestied preexciation on the function of atrioventricular nodal anterograde conduction

目的分析显性预激患者射频消融术后的房室结前传功能的变化。方法选取成功射频消融的单支房室旁道127例,其中显性预激46例,隐匿性预激81例。比较两组患者在消融后、显性预激组的消融后与随访时、左侧与右侧旁道的心电图各参数的变化。结果显性预激组患者消融术后的PR间期长于隐匿性预激组,显性预激组患者在随访时的PR间期短于消融术后,左侧旁道患者的PR间期短于右侧,但各组心率(HR)、QRS波时限、QTc间期均未见明显差异。结论显性预激患者,消融后PR间期较长,左右侧旁道延长程度不同,但随着时间的推移PR间期可恢复正常。

Objective To investigate the change of the atrioventricular nodal anterograde conduction after the radiofre- quency catheter ablation（RFCA） in manifestied preexciation. Methods One hundred and twenty-seven patients with preexciation syndrome were confirmed to be single accessory pathway by RFCA successfully,46 of whom were manifestied preexciation, 81 were concealed accessory pathway. To compare the parameters of electrocardiogram before and after RFCA, and the parameters during follow-up and after RFCA in left and right atrioventricular accessory pathway with manifestied preexcitation. Results After RFCA, the PR intervals in manifestied preexciation group was longer than that of the con- cealed accessory pathway group. In manifestied preexciation group, the PR intervals during follow-up were shorter than that after RFCA, the PR intervals in left atrioventricular accessory was shorter than that of the right one. But the heart rates, QRS durations and QTc intervals had no sigificant difference between all of these groups. Conclusion For the manifes- tied preexciation ,the PR intervals after RFCA is longer than that of before ablation ,but the degree of PR interval prolonga- tion in left atrioventricular accessory is different from the right. As time goes on, the PR intervals will return to normal gradually.