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The Effects of Stent Implantation on the Heart Rate Variation in Patients with Coronary Heart Disease

QIN Xiaozhi,JIN Zhenyi.Department of Cardiology,Affiliated Hospital of Yanbian University,Yanji City,Jilin Province133000  
Objective:To observe the heart rate variation(HRV) in patients with coronary heart disease after stent implantation and evaluate the effect of stent implantation on the self nerve system function.Methods: The stent implantations were performed from January,2005 to 2007 on 67 patients with coronary heart disease.Their HRV(time domain and frequency domain) were analyzed before,and 7days and 6 months after stents implantation.Results:There were no significant difference in SDNN,SDANN,PNN50,TI,LF and LF/HF before and after stents implantation(P0.05).The index of time domain and frequency domain,as SDNN,SDANN,PNN50,TI,LF and LF/HF increased significantly after stent implantation(P0.01).There was no significant difference in rMSSD and HF.Conclusion: There was no significant improvement in HRV shortly after stent implantation.HRV improved markedly in patients with coronary heart disease 6 months after the performance.This phenomenon may be related to the improvement of cardiac ischemia and the recovery of the self cardiac nerve equilibrium.
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