Onset of SVT time - T1 (start of first diagnostic electrophysiological study until induction of first SVT); Diagnostic electrophysiological study time - T2 (start of first diagnostic electrophysiological study until start of ablation); RFCA/ cryoablation procedure time - T3 (start of first diagnostic electrophysiological study until end of final diagnostic electrophysiological study); Wake-up time - T4 (from end of wound dressing to patient exit from the operating room to the post-anesthesia care unit); Total anesthesia time -T5 (from patient entry to operating room to exit from operating room).