Long-term Outcomes and Recurrence Rates in Mahaim Tachycardia Post-Ablation

Abstract Objective: To evaluate the long-term outcomes and recurrence rates of Mahaim tachycardia post-radiofrequency catheter ablation in patients treated at the Cardiology Department of Hayatabad Medical Complex, Peshawar. Methodology: A retrospective cohort study was conducted involving 170 patients with Mahaim tachycardia who underwent radiofrequency catheter ablation between June 2017 and July 2024. Patient demographics, procedural details, complications, and long-term follow-up data were analyzed. The primary outcome was the recurrence rate of Mahaim tachycardia, while secondary outcomes included procedural success, complications, and overall survival. Results: The mean age of the cohort was 44.1 years, with 55.3% male patients. Hypertension and diabetes were present in 22.9% and 21.8% of patients, respectively. The mean fluoroscopy and ablation times were 19.8 and 9.9 minutes, respectively. Procedural success was achieved in 78.2% of patients, with a complication rate of 12.9%. Over a median follow-up of 40.6 months, the recurrence rate was 21.8%, and the survival rate was 79.4%. The Kaplan-Meier survival analysis showed a high survival probability, with 95.8% at 12 months and 88.6% at 36 months. Conclusion: Radiofrequency catheter ablation is a very successful and safe therapy for Mahaim tachycardia, offering substantial long-term advantages while maintaining tolerable rates of complications. Despite a recurrence rate of 21.8%, the procedure offers favorable long-term outcomes, reinforcing its use as a preferred treatment modality. Future studies should focus on advanced techniques to further improve success and reduce recurrence rates.