Optimal method for ablation of atypical AVNRT
Amir Aslani1, Shahab Shahrzad2, Mehdi Bazrafshan3
1Cardiology Department, Shiraz University of Medical Sciences, Shiraz, Iran.
BMC Cardiovascular Disorders
|May 19, 2023
Summary
Ablation 2 mm higher in the septum for atypical atrioventricular nodal reentrant tachycardia (AVNRT) significantly improves success rates and reduces recurrence compared to conventional methods. This optimized approach offers a more promising treatment for patients with this arrhythmia.
Area of Science:
- Cardiology
- Electrophysiology
- Medical Devices
Background:
- Atypical atrioventricular nodal reentrant tachycardia (AVNRT) ablation can be challenging, with conventional methods sometimes proving unsuccessful.
- The right posterior septum is a common target, but alternative strategies are needed for improved outcomes.
Purpose of the Study:
- To present an optimized radiofrequency ablation technique for atypical AVNRT.
- To evaluate the efficacy of this modified ablation method in preventing arrhythmia recurrence.
Main Methods:
- A prospective, double-center study involving 62 patients with atypical AVNRT undergoing radiofrequency ablation.
- Patients were randomized into two groups: Group A (conventional slow pathway ablation) and Group B (ablation 2 mm higher in the septum).
Main Results:
- Ablation was successful in 80% of Group A patients, with some requiring additional procedures.
- All patients in Group B achieved successful ablation.
- After 48 months, recurrence rates were 13.3% in Group A versus 0% in Group B (p < 0.001).
Conclusions:
- Ablation 2 mm superior to the conventional slow pathway target area demonstrates higher success rates for atypical AVNRT.
- This optimized technique significantly reduces the recurrence of symptomatic atypical AVNRT, offering a more effective treatment strategy.
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