Aim: To assess effect of radio frequency catheter ablation (RFCA) on heart rate variability (HRV) in patients with supraventricular tachyarrhythmias (SVT).
Methods: Spectral analysis of HRV on 5-minute ECG strips was carried out in 19 patients with SVT before and 2 days after RFCA.
Results: Both total and high frequency power significantly decreased (p<0,05) after RFCA in supine and orthostatic positions. Significant decrease of low frequency power occurred after RFCA in orthostatic position.
Conclusion: In patients with SVT RFCA alters autonomic regulation of chronotropic function of the heart. Sympathetic and parasympathetic influences on the chronotropic function of the heart are attenuated in early period after the procedure.
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