[Myocardial dysfunction secondary to persistent tachycardia]
View abstract on PubMed
Summary
Incessant atrioventricular tachycardia (IAVT) can cause reversible ventricular dysfunction. Surgical ablation of the anomalous pathway effectively restored normal heart function and eliminated tachycardia in patients refractory to medication.
Area of Science:
- Cardiology
- Electrophysiology
- Cardiac Surgery
Context:
- Incessant atrioventricular tachycardia (IAVT) is a rare arrhythmia.
- Patients with IAVT often present with ventricular dysfunction.
- Drug-refractory IAVT poses a significant clinical challenge.
Purpose:
- To evaluate the impact of surgical ablation on ventricular dysfunction in patients with IAVT.
- To assess the efficacy of surgical intervention in managing drug-refractory IAVT.
- To demonstrate the reversibility of myocardial dysfunction following successful arrhythmia ablation.
Summary:
- This study investigated five patients with IAVT and ventricular dysfunction who underwent surgical ablation.
- Preoperative assessments revealed persistent tachycardia, impaired ejection fraction, and enlarged left ventricular diastolic diameter.
- Electrophysiologic study identified a postero-septal anomalous atrioventricular pathway.
- Post-ablation, all patients achieved asymptomatic sinus rhythm with significant improvement in ejection fraction and normalization of ventricular dimensions.
Impact:
- Surgical ablation of anomalous atrioventricular pathways is a highly effective treatment for IAVT.
- Myocardial dysfunction associated with IAVT is reversible after successful ablation.
- This intervention offers a definitive solution for patients refractory to antiarrhythmic drugs.