Safety and efficacy of flecainide associated with beta-blockers in arrhythmogenic right ventricular cardiomyopathy

Europace. 2022 Feb 2;24(2):278-284. doi: 10.1093/europace/euab182.


Aims: Arrhythmogenic right ventricular cardiomyopathy (ARVC) is an inherited cardiomyopathy associated with a high risk of ventricular arrhythmia (VA). Current guidelines recommend beta-blockers as first-line medical therapy and if ineffective, sotalol or amiodarone. We describe our experience, as a tertiary centre for ARVC, with the effectiveness and tolerance of flecainide in addition to beta-blockers to prevent VA in ARVC.

Methods and results: We retrospectively included 100 consecutive ARVC patients who received flecainide with beta-blockers between May 1999 and November 2017. Treatment persistence and related side effects were assessed, as was VA-free survival on treatment, 24-h Holter monitoring and programmed ventricular stimulation (PVS) off- and on-treatment. Tolerance was good, with 10% flecainide discontinuations (lack of efficacy in six, atrial fibrillation in one, and side effects in three). No Brugada-induced electrocardiography pattern on flecainide or haemodynamic impairment was reported. Premature ventricular contraction burden at 24-h Holter monitoring was significantly decreased under treatment [median 415 (interquartile range, IQR 97-730) vs. 2370 (1572-3400) at baseline, P < 0.0001, n = 46]. Among the 33 patients with PVS under treatment, PVS was positive in 40% on-treatment vs. 94% off-treatment (P < 0.001). During a median follow-up of 47 months (IQR 23-73), 22 patients presented sustained VA on treatment, corresponding to an event rate of 5% [95% confidence interval (CI) (0.6-9)] at 1 year and 25% [95% CI (14-35)] at 5 years under treatment. No patient died.

Conclusion: This study suggests that flecainide and beta-blockers association is complementary to implantable cardioverter-defibrillator and catheter ablation and is safe for treating persistent symptomatic VA in patients with ARVC.

Keywords: Antiarrhythmic drugs; Arrhythmogenic right ventricular cardiomyopathy/dysplasia; Beta-blockers; Cardiomyopathy; Flecainide; Ventricular tachycardia.

MeSH terms

  • Arrhythmogenic Right Ventricular Dysplasia* / complications
  • Arrhythmogenic Right Ventricular Dysplasia* / diagnosis
  • Arrhythmogenic Right Ventricular Dysplasia* / drug therapy
  • Atrial Fibrillation* / drug therapy
  • Defibrillators, Implantable*
  • Flecainide / adverse effects
  • Humans
  • Retrospective Studies
  • Sotalol
  • Tachycardia, Ventricular* / complications
  • Tachycardia, Ventricular* / diagnosis
  • Tachycardia, Ventricular* / drug therapy
  • Treatment Outcome


  • Sotalol
  • Flecainide