Patient population:
This was a prospective interventional study conducted in two tertiary care centers. Ethics committee approval for the study was obtained from each of the centers.
Inclusion criteria: Informed consent was obtained from patients undergoing accessory pathway ablation. Those who underwent successful radiofrequency ablation of AP were included in the study.
Exclusion criteria: The following patients were excluded
Patients with multiple APs
2. Atriofascicular pathways
3. Patients with concealed septal AP where distinguishing transient retrograde conduction via AP or AV nodal system was inconclusive. However, septal accessory pathways with manifest preexcitation were included in the study.
4. Patients who had COPD (Chronic obstructive pulmonary disease) and bronchial asthma where intravenous adenosine could lead to an acute exacerbation.
Multiple APs, atriofascicular pathway and concealed septal AP were diagnosed during the electrophysiological study (EPS) and hence patients with these pathways were excluded after EPS.