Dual tachyarrhythmia: Ventricular fibrillation induced by atrial tachyarrhythmia in a patient with hypertrophic cardiomyopathy.

A patient with hypertrophic cardiomyopathy experienced cardiopulmonary arrest. An automated external defibrillator administered defibrillation for ventricular fibrillation (A). The pacemaker recorded atrial tachycardia with a rapid ventricular response before the patient collapsed (B). After a few minutes, the pacemaker records dual tachyarrhythmia, characterized by the simultaneous presence of ventricular fibrillation (VF) and atrial fibrillation (AF) (C). This case demonstrates that VF induced by atrial tachyarrhythmia could contribute to AF-related sudden cardiac death.
Competing Interests: Dr. Shingo Sasaki received a research grant from Boston Scientific Japan Co., Ltd. and is a concurrent associate professor of the Department of Advanced Management of Cardiac Arrhythmias and the Department of Cardiac Remote Management System. Dr. Yuji Ishida is an assistant professor of the Department of Cardiac Remote Management Systems, which is an endowment department supported by BIOTRONIK Japan Co., Ltd. Dr. Hirofumi Tomita is a concurrent professor of the Department of Advanced Management of Cardiac Arrhythmias, the department of Cardiac Remote Management System, and the department of the Advanced Therapeutics for Cardiovascular Diseases, which is an endowment department supported by Boston Scientific Japan Co., Ltd. Dr. Tomita also received a research grant from Abbott Medical Japan LLC. Other authors have no relevant disclosures.
(© 2023 The Authors. Journal of Arrhythmia published by John Wiley & Sons Australia, Ltd on behalf of Japanese Heart Rhythm Society.)