The Effect of Functional Cardiac Status on Heart Rate Variability in Patients with Congestive Heart Failure
Dr. Feridun KOŞAR* Dr. Hakan GÜ NEN** Dr. Bektaş BATTALOĞLU*** Dr. Alpay SEZGİ N* Dr .Halil ARSLAN*
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Abstract
Aims: The dysfunction of cardiac autonomic nervous system has been observed in patients with cardiac failure. A relation between the depression of heart rate veriability (HRV) and the extent of left ventricular dysfunction has been controversially reported. HRV is used to assess cardiac autonomic function. In this study, we examined HRV parameters and autonomous state in patients with idiopathic dilated cardiomyopathy (DCMP) or congestive heart failure (CHF).
Methods: Cardiac autonomous activity was assessed noninvasively from 24-hour electrocardiographic ambulatory recording by calculating heart rate variability (HRV). Mean RR, SNDD, rMSSD and PNN 50 %> were measured in ali patients and controi subjects (CS) (18 idiopathic dilated cardiomyopathy patients and 20 control subjects). In addition 18, patients with DCMP or CHF were classiHed according to functionai cardiac status (New York Heart Association).
Resu/ts: No differences were found between DCMP and CS according to age and sex. Depression of HRV was observed in DCMP patients (Mean RR: 632±83ms vs 727±75ms, P
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