Risk factors of atrial fibrillation progression in patients with congenital heart disease

Can Zhang1, Nawin L Ramdat Misier1, Lixia Dai1

  • 1Department of Cardiology, Unit Translational Electrophysiology, Erasmus Medical Center, Dr. Molewaterplein 40, Rotterdam, 3015GD, Netherlands.

Insights

Atrial fibrillation (AF) progression is common in adults with congenital heart disease (CHD). Female sex, mild/moderate CHD complexity, and ventricular pacing are key risk factors for AF progression.

Area of Science:

  • Cardiology
  • Electrophysiology
  • Congenital Heart Disease

Background:

  • Atrial fibrillation (AF) is increasingly prevalent in adults with congenital heart disease (CHD).
  • Predictors of AF progression in this population are poorly defined.
  • Understanding these predictors is crucial for managing cardiovascular health in adults with CHD.

Purpose of the Study:

  • To identify risk factors for the progression of atrial fibrillation (AF) in adults with congenital heart disease (CHD).
  • To elucidate predictors of AF progression in a population where AF is common but risk factors are not well-established.

Main Methods:

  • A cohort of 125 adults with CHD and AF was followed for 17±8 years.
  • AF progression was defined as the transition from paroxysmal to persistent/permanent AF.
  • Time-dependent Cox regression and Fine-Gray competing risk models were used to identify risk factors, evaluating atrial tachycardia, pacing modes, QRS duration, and QTc interval changes.

Main Results:

  • AF progression occurred in 45.6% of patients, with median follow-up of 5 years.
  • Progression was associated with more pronounced QRS duration and QTc interval prolongation.
  • Independent risk factors identified included female sex, mild/moderate CHD complexity, and baseline ventricular pacing.

Conclusions:

  • AF progression is common in adults with CHD and linked to significant ventricular electrical remodeling.
  • Both modifiable (pacing mode) and intrinsic (sex, CHD complexity) factors contribute to AF progression.
  • These findings aid in identifying high-risk CHD patients for targeted monitoring and treatment strategies.
Abstract

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