Electrophysiological Characteristics, Accessory Pathway Distribution, and Ablation Outcomes in Supraventricular Tachycardia: A Prospective Study From a Tertiary Cardiac Centre in Northern India

Sameer Purra; Imran Akram Khanday; Gulnar Shah; Waris Shah Purra

doi:10.36948/ijfmr.2026.v08i05.88133

Electrophysiological Characteristics, Accessory Pathway Distribution, and Ablation Outcomes in Supraventricular Tachycardia: A Prospective Study From a Tertiary Cardiac Centre in Northern India

Author(s)	Dr. Sameer Purra, Dr. Imran Akram Khanday, Dr. Gulnar Shah, Dr. Waris Shah Purra
Country	India
Abstract	Background: Supraventricular tachycardias (SVTs) are common arrhythmias that frequently result in recurrent emergency visits and impaired quality of life. Regional electrophysiological data from northern India, particularly Himachal Pradesh, remains limited. Objectives: To evaluate the clinical profile, electrophysiological mechanisms, accessory pathway distribution, and catheter ablation outcomes among patients undergoing electrophysiology study (EPS) for SVT. Methods: This prospective observational study included 207 consecutive adults evaluated for SVT over a two-year period. Clinical characteristics, ECG findings, EPS parameters, tachycardia mechanism, ablation strategy, and acute outcomes were systematically recorded. Comparative analysis between atrioventricular nodal re-entrant tachycardia (AVNRT) and atrioventricular re-entrant tachycardia (AVRT) was performed using appropriate statistical tests. Results: The cohort comprised 207 patients (mean age 38 ± 14 years; 58% female). AVNRT was the predominant mechanism (139 patients, 67.1%), followed by AVRT (68 patients, 32.9%). AVNRT patients were significantly older and more likely to be female than AVRT patients (p < 0.01). Pre-excitation on baseline ECG was exclusively observed in AVRT (64.7%, p < 0.001). Acute ablation success was high overall (91.3%), with higher success in AVNRT compared with AVRT (95.7% vs. 88.2%, p = 0.04). Complications were infrequent and minor, and early recurrence occurred in 2.4% of patients. Conclusion: AVNRT is the most common SVT mechanism, while AVRT demonstrates a characteristic predominance of left lateral accessory pathways. Catheter ablation is highly effective and safe, supporting its role as first-line therapy for symptomatic SVT in this region.
Keywords	Supraventricular tachycardia; AVNRT; AVRT; accessory pathway; electrophysiology study; catheter ablation
Field	Medical / Pharmacy
Published In	Volume 8, Issue 5, September-October 2026
Published On	2026-09-20
DOI	https://doi.org/10.36948/ijfmr.2026.v08i05.88133

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Electrophysiological Characteristics, Accessory Pathway Distribution, and Ablation Outcomes in Supraventricular Tachycardia: A Prospective Study From a Tertiary Cardiac Centre in Northern India

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