Effect of Radiofrequency Current Application during Catheter Ablation on Heart Rate Variability in Patients with Supraventricular Tachycardia

Abstract

he autonomic nervous system has a significant regulatory effect on heart function; in addition to heart rate, cardiac conduction properties, hemodynamics, the cellular properties of cardiac myocytes, and cardiac arrhythmogenesis are also affected by the autonomic nervous system . Supraventricular arrhythmias are common and patients are often symptomatic, requiring management with drugs and electrophysiological procedures. Recently, radiofrequency current ablation (RFCA) became the standard energy source in the management of patients with various types of tachyarrhythmia. Several studies have demonstrated an increase in heart rate (HR) and a decrease in HR variability (HRV) after radiofrequency catheter ablation (RFCA) of supra-ventricular tachycardia due to vagal denervation. In this study, we aimed to assess the Relationship between duration of RF current application during Catheter ablation and it's effect on Heart Rate variability in patients undergoing RF catheter ablation for supraventricular Tachycardia. This study is a prospective cohort study, which included 20 patients from Ain Shams University hospitals, who underwent RF ablation of SVT in the period from March 2020