Key result
Catheter ablation of the slow pathway is a viable treatment for incessant typical atrioventricular nodal reentrant tachycardia with a prolonged PR interval during sinus rhythm.
Why the study?
There are no consensus criteria to define incessant, as opposed to paroxysmal, AVNRT, and initiation mechanisms may have important therapeutic implications.
Case Report
Catheter ablation of the slow pathway is a viable treatment for incessant typical AVNRT with a prolonged PR interval during sinus rhythm.
Answers are grounded in this paper and cite their sources.
Supports ablation in select incessant AVNRT with prolonged PR; hypothesis-generating and requires prospective validation.
Key Teaching Points•Catheter ablation of the slow pathway is a viable treatment for incessant typical atrioventricular nodal reentrant tachycardia (AVNRT) with a prolonged PR interval during sinus rhythm and a continuous anterograde atrioventricular (AV) node function curve.•There are no consensus criteria within the cardiac electrophysiology community to define incessant, as opposed to paroxysmal, AVNRT.•AV node function curves may offer insight into potential arrhythmia mechanisms.•Initiation mechanisms for incessant AVNRT, such as changes in sinus rate and/or premature atrial complexes with varying coupling intervals, may have important therapeutic implications.•Cardiac magnetic resonance imaging may diagnose underlying idiopathic nonischemic cardiomyopathy in patients with associated reduced left ventricular ejection fraction. •Catheter ablation of the slow pathway is a viable treatment for incessant typical atrioventricular nodal reentrant tachycardia (AVNRT) with a prolonged PR interval during sinus rhythm and a continuous anterograde atrioventricular (AV) node function curve.•There are no consensus criteria within the cardiac electrophysiology community to define incessant, as opposed to paroxysmal, AVNRT.•AV node function curves may offer insight into potential arrhythmia mechanisms.•Initiation mechanisms for incessant AVNRT, such as changes in sinus rate and/or premature atrial complexes with varying coupling intervals, may have important therapeutic implications.•Cardiac magnetic resonance imaging may diagnose underlying idiopathic nonischemic cardiomyopathy in patients with associated reduced left ventricular ejection fraction.
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Norman C. Wang (2023) conducted a case report in Incessant typical atrioventricular nodal reentrant tachycardia (AVNRT) with prolonged PR interval. Catheter ablation of the slow pathway was evaluated. Catheter ablation of the slow pathway is a viable treatment for incessant typical atrioventricular nodal reentrant tachycardia with a prolonged PR interval during sinus rhythm.
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