经皮腔内冠脉成形术后心率变异性变化与心肌梗死部位的相关性分析

对６５例不同陈旧性心肌梗死部位患者采用频域和时域法分析经皮腔内冠脉成形术（ＰＴＣＡ）前、后的心率变异性（ＨＲＶ），旨在了解不同心肌梗死部位患者ＨＲＶ的变化及ＰＴＣＡ术对患者自主神经系统的影响。结果提示不同心肌梗死部位患者的ＨＲＶ无明显差异，而ＰＴＣＡ术后高频段（ＨＦ）、标准差（ＳＤＮＮ）均技术前增加，低频段（ＬＦ）及ＬＦ／ＨＦ较术前降低。说明ＰＴＣＡ术后交感神经活性降低迷走神经活性增加。提出ＰＴＣＡ术后可能改善冠心病患者的远期预后。

The changes of heart rate variability after PTCA andthe study of relationship with the site of myocardial infarction

Heart rate variability(HRV) was analyzed in 65 Patients with oldmyocardial infarction before and after percutaneous transluminal coronary angioplasty(PTCA) , in order to observe whether there was a relation between HRV and the size ofmyocardial infarction and to observe the effect of PTCA on autonomic nervous system.The results showed that there was no significant difference between HRV and infart sitebefore and after PTCA, but HF, SDNN were significantly increased and LF, LF/HFwas significantly reduced at six months after PTCA compared with that before PTCA(P<0. 05 in all). It suggested that the sympathetic activity was diminished and the va-gal activity was raised after PTCA, and successful PTCA improve the long-term prog-nosis of patients.