射频消融对室上性心动过速(左侧旁道)患者左室功能的影响

目的 观察射频消融术（RFCA）对房室折返性心动过速（左侧旁道）[AVRT（L）]患者左室功能的影响。方法 利用二维和Doppler超声检查AVRT（L）患者手术前、后三天左室收缩功能及舒张期充盈情况，为提高敏感性，检查时增加了三级等长收缩运动。结果 （1）在各级运动中心率（HR）、收缩压（SBp)、舒张压（DBp)均显著增加，但三者均值分别不超过90bpm、160mmHg、95mmHg，运动后五分钟均恢复。（2）RFCA术前，后同级运动量时左室功能各参数无显著变化。结论 对于AVRT（L）患者，在有经验医师操作下，RFCA术中施放总能量在一定范围内时，对左室功能无影响。

Influence of radiofrequency catheter ablatioin on the left ventricular function in patients with supraventricular tachycardia(left accessory pathway)

Objective To observe the influence of radiofrequency catheter ablation(RFCA) on the left ventricular function in patients with atrial ventricular reentrant tachycardia (left accessory pathway) [AVRT(L)] .Methods Examing the left ventricular systolic function and the diastolic filling patterns in patients with AVRT(L) by two dimension and doppler echocardiography three days before and after the procedure,three grades of isometric actions were added during test to improve the sensitivity of the detection.Results (1)HR,SBp and DBp all increased significantly in each grade of the actions,while their mean values did not overpass 90 bpm,160 mmHg and 95 mmHg respectively,and all of them returned to the original levels 5 minutes after the actions.(2)None of the parameters of left ventricular function showed significant difference in the same grade of actioin before and after the ablation.Conclusion RFCA do not affect the left ventricular function as the procedure being operated by experienced doctors and the energy applied being controlled below a reasonable level.