心肌病变部位对心率变异性的影响

<title>e Study on the Correlation of Location of Myocardial Perfusion Defects and the Heart Rate Variability

目的 探讨心肌病变不同部位对心率变异性(HRV)变化的影响。方法 应用单光子发射机断层显象(SPECT)及同时检测24小时动态心电图共137例,对其中59例有心肌病变者与78例正常者进行心率变异性分析,比较不同部位心肌病变时HRV变化,找出其规律。结果1.与正常组比较心肌有病变时,HRV降低:2.当心尖部、前壁、后壁、间壁病变时可引起SDNN,SDANN Index、PNN50下降,后壁SDNN Index下降,间壁可引起rMSSD下降,但侧壁则上述指标无变化。结论 心肌病变时可引起HRV下降,但心肌病变部位对HRV各指标影响可能不同。

<abstract>iective To investigate the relationship between the HRV and the myocardial defects of different site detected by using SPECT. Methods Hoter ECG was examined in 137 petients . The index of HRV were SDNN, SDANN Index, SDNN Index, rMSSD and PNN50. SPECT was done in 137 patients whom 59 were found to have abnormal myocardial perfusion. The location of the rayocardial defects was analysed. The HRV of 6 different locations were compared. Results (1)The SDNN and PNN50 were decrease in patients with rayocardial defects (P<0.01) (2)Myocardial defects of the apex, anterior, posterior , inferior and intermedia walls had similar affects on the HRV, while defects of the lateral wall didn't show much influence on the HRV. Conclusions The dysfunction of autonmic nervous system of the heart is correlated with the location of myocardial defects. Lesions of the apex, anterior, posterior, inferior and intermedia walls have similar influence on the HRV, while that of the lateral wall has minimum.