[Dynamics of parameters of heart rate variability after radiofrequency ablation in patients with paroxysmal supraventricular tachycardia: holter ECG monitoring data].

Changes of parameters of heart rate variability (HRV) in patients with supraventricular tachycardia (SVT) immediately after radiofrequency ablation (RFA) have been demonstrated earlier. However dynamics of HRV parameters after RFA has not been sufficiently studied. For elucidation of dynamics of HRV parameters in patients with SVT after RFA we conducted analysis of HRV basing on data of 24 hour Holter ECG monitoring before RFA, on day 2, in 1 week and 1 month after intervention in 27 patients with paroxysmal SVT. Statistically significant lowering of temporal (SDNNi, RMSSD, NN50, pNN50) and spectral (VLF, LF, HF) HRV parameters were found on day 2 and in 1 week after RFA compared with data obtained before intervention. In 1 month after RFA the studied parameters of HRV did not differ from baseline values. Reversible changes of HRV parameters evidencing for transitory autonomic dysfunction are observed after RFA.