Related Experiment Video
Updated: Jul 3, 2026

Dual-Dye Optical Mapping of Hearts from RyR2R2474S Knock-In Mice of Catecholaminergic Polymorphic Ventricular Tachycardia
Published on: December 22, 2023
Torsade de pointes associated with bradycardia and takotsubo cardiomyopathy
Satoshi Kurisu1, Ichiro Inoue, Takuji Kawagoe
1Department of Cartdiology, Hiroshima City Hospital, Hiroshima, Japan. skurisu@nifty.com
Abstract:
Two cases of torsade de pointes associated with bradycardia and takotsubo cardiomyopathy are reported. In both cases, atrioventricular block preceded the occurrence of takotsubo cardiomyopathy. Bradycardia-induced QT interval prolongation seemed to be amplified by the occurrence of takotsubo cardiomyopathy, resulting in torsade de pointes. Temporary ventricular pacing at a high rate decreased the QT interval and prevented the recurrence of torsade de pointes. Because atrioventricular block recurred or persisted even after the resolution of takotsubo cardiomyopathy, the patients received permanent pacemakers.
Related Concept Videos
Dysrhythmias II: Classification of Tachyarrhythmias
Dysrhythmias IV: Characteristics of Bradyarrhythmias
Decreased pulse rate
There are specific risk factors that can elevate the likelihood of developing bradycardia. Advanced age is a significant factor, with bradycardia...
Dysrhythmias III: Characteristics of Dysrhythmias
Antiarrhythmic Drugs: Class III Agents as Potassium Channel Blockers
ECG Interpretation of Arrhythmias II: Atrial, Junctional and Ventricular Arrhythmias
