Study population
This prospective observational study was conducted at The Alfred, The Royal Melbourne, The Melbourne Private and Cabrini Hospitals in Melbourne, Australia between November 2017 and October 2019. Consecutive patients with documented SVT undergoing electrophysiological study (EPS) with a view to ablation were invited to participate. The participants were included in the study if typical AVNRT was inducible and sustained on at least 2 occasions. AVNRT was diagnosed based on established criteria during detailed EPS using atrial and ventricular pacing manoeuvres23, 28-30. Patients with other forms of SVT or if non-inducible were excluded from the study. The study was approved by institutions ethics review committees. All participants provided written informed consent to be in included in the study.