Potential Arrhythmogenic Risk of DDI/DDD Pacing Modes During Atrial Fibrillation

A 67-year-old man with an implantable-cardioverter defibrillator (ICD) phoned our Department of Cardiology to report the occurrence of palpitations and dizziness. He was implanted two years before with a dual-chamber ICD (Energen F143, Boston Scientific, Natick, MA, USA) in primary prevention for dilated cardiomyopathy with severely reduced left ventricular ejection fraction, without complication.