73-03: Supraventricular tachycardia in patients with arrhythmogenic right ventricular cardiomyopathy Free

Introduction: Ventricular tachycardia (VT) and sudden cardiac death are common first manifestations of arrhythmogenic right ventricular cardiomyopathy/dysplasia (ARVC). Nevertheless, supraventricular tachycardia (SVT) is not rare and can lead to symptomatic palpitations, inappropriate ICD therapy and thromboembolic events. This study sought to assess the prevalence of SVT in a large cohort of patients with ARVC.

Methods: SVT occurrence has been interrogated in patients from our ARVC database (70 patients, 49 male, age 53.1 ± 13.8years, 45 patients (64.3%) with previous VT ablation). ARVC/D diagnosis was confirmed using modified ARVC/D criteria. Rhythm monitoring has been done by 12 lead ECG, Holter ECG and device interrogations.

Results: 26 patients of 70 patients (37.1%) have been diagnosed with SVT. In detail have been found: atrial fibrillation (16 patients, 22,9%, ectopic atrial tachycardia (7 patients, 10.0%), atrial flutter (6 patients, 8.9%), frequent premature atrial contractions (2 patients, 2.9%) and atrioventricular re-entrant tachycardia (1 patient, 1.4%). The diagnosis of SVT was associated to VT recurrence in patients with previous VT ablation (p = 0.007)

Conclusion: SVT frequently occur in patients with ARVC and may significantly contribute to morbidity and mortality. Diagnosis of SVT correlates with VT recurrence in patients with previous VT ablation. Thus, beside smart ICD programming, antiarrhythmic drug therapy and anticoagulation, ablation of SVT might be considered in ARVC patients with frequent VT.