Transient fetal atrioventricular block: A series of four cases and approach to management

摘要

Abstract Introduction Fetal atrioventricular block (AVB) is a failure of conduction from atria to ventricles. Immune‐ and nonimmune‐mediated forms occur, especially in association with congenital heart disease. Second‐degree (2°) AVB may be reversible with dexamethasone and intravenous immunoglobulin in immune‐mediated disease. However, once third‐degree?AVB develops, it is deemed irreversible with need for a pacemaker and risk for cardiomyopathy. Rarely, 2° AVB is a transient, benign phenomenon in the immature conduction system. Few case series of transient AVB have been reported, but a management approach has not been defined. Methods/Results/Conclusion We report four patients with self‐resolving, nonimmune fetal AVB and outline a management strategy.