冠心病和充血性心力衰竭患者的心率变异性

Heart rate variability in patients with coronary heartdisease and congestive heart failure

提要本文采用标准差法及心率变异指数法分析了冠心病、充血性心力衰竭及正常人各５０例的心率变异性，结果发现冠心病者及充血性心力衰竭者的心率变异值显著低于正常人。心衰组中，心衰程度越重者，心率变异越低。且心率变异与心胸比值及ＰＥＰ／ＬＶＥＴ呈负相关，与心脏指数呈正相关。急性心肌梗死者的心率变异值显著低于陈旧性心肌梗死和心绞痛者。２４例心肌梗死者查心室晚电位，晚电位阳性者的心率变异值显著低于晚电位阴性者，提示两者结合可提高对心血管事件预测的准确性。

The authorshave evaluated the heart rate variability (HRV) in 50cases with coronary heart disease (CHD) , 50 cases with congestive heart failure (CHF)and 50 normal subjects by 24 hour standard deviation of normal-normal RR intevals(SDNN) and HRV index (HRVI). The results indicate that HRV in patients with CHDand CHF was significantly lower than that of normal subjects. In CHF group, it indi-cates that the more severe CHF , the lower HRV. HRV is significantiy related to cardiacindex, PEP/LVET and cardiothoracic ratio.In CHD group , HRV in patients with posi-tive ventricular late potential (VLP) was significantly lower than that of patients withnegative VLP. This study suggests that a combination of HRV with VLP can increasethe prognostic value for cardiac events.