Leadless cardiac pacemakers were introduced as a novel approach to treat bradyarrhythmias, overcoming the risk of lead- and pocket-associated complications of transvenous pacemakers.1, 2, 3 Recently, a system with an accelerometer capable of detecting mechanical atrial activity has been introduced, offering the opportunity for atrioventricular (AV) synchronous pacing.4, 5, 6 Owing to their intracardiac position, leadless cardiac pacemakers are inevitably in the path of electrical current during treatment with external cardioversion. This might increase the risk for damage to the implanted device. To our knowledge, this is the first case report of pacemaker dysfunction of a leadless cardiac pacemaker after external cardioversion.
