Detection and Clinical Significance of Heart Rate Turbulence in Patients with Chronic Heart Failure

Objective To explore the relationship between heart rate turbulence(HRT) and the degree of heart function in patients with chronic heart failure(CHF).Methods 85 patients with CHF were divided into two groups according to New York Heart Association(NYHA) functional classification.Group A included 45 patients with Ⅱ degree and group B include 40 patients with Ⅲ-Ⅳ degree.The control group includes 42 patients with normal cardiac function.All patients received Holter EKG examination.The turbulence onset(TO) and turbulence slope(TS) of HRT were calculated individually and statistic analysis were done.Results There were extremely significant difference between group B and control group(P0.01), significant difference between group A and control group(P 0.05) in TO.There were extremely significant difference between every two among three groups(P0.01) in TS.Conclusion The phenomenon of HRT decline with the Decreasing of heart failure, which was suspected to be related with change of autonomic nerve.