【摘要】 采用心率功率谱对11例房室结折返性心动过速（A组）、9例右侧旁边（B组）和21例左侧旁道（C组）致房室折返性心动过速的患者于射频消融前、消融后1、2、3、5、10d进行连续动态观察，比较低频段功率（LFP）、高频段功率（HFP）和LFP与HFP的比值。结果显示所有患者于术后1dHFP均降低，但A组持续下降时间长于B、C两组，消融能量小于3500J者，LFP于术后第2天才下降，消融能量大于3500J者手术后第1天即出现下降，结果同时显示上述心率变异性（HRV）的改变于术后10d可恢复至术前水平。表明消融后HRV的降低系副交感神经受损的结果，而消融能量大者亦可同时损伤交感神经，导管的机械刺激和电刺激对HRV无影响。更多还原

【Abstract】 Dynamic observation of heatt rate variability (HRV) before and 1, 2, 3, 5, 10 d after radiofrequency ablation in 11 patients with AVNRT (group A), 9 with right-sided accessory pathway AVRT (group B) and 21 with left-sided accessory pathway AVRT (group C ) were performed. The variables observed were high-frequency power(HFP) ’low-frequency power (LFP) and LFP/HFP. The high-frequency power(HFP) was significantly decreased after first day in all patients but the lasting time in group A was longer than group B and C. The low-frequency power (LFP) was significantly decreased after the second day in patients with ablative energy less than 3500 J. The LFP was significantly decreased after first day in patients with ablative energy more than 3500 J. The results suggest that decrease of HRV after ablation may due to damage of parasmppathetic nerve. While ablation with larger radio-frequency energy. the sympathetic nerve may be damaged also.更多还原