Ventricular Fibrillation Resulting from Synchronized Internal Atrial Defibrillation in a Patient with Ventricular Preexcitation |
| |
Authors: | HELEN S BAROLD MD J MARCUS WHARTON MD |
| |
Institution: | Division of Cardiology, Department of Medicine, Duke University Medical Center, Durham, North Carolina |
| |
Abstract: | VF After Synchronized Internal Atrial Defibrillation. This case describes ventricular proarrhythmia as a result of a synchronized internal atrial defibrillation shock in a 29-year-old man with Ebstein's anomaly referred for radiofrequency ablation of a right posterior accessory pathway. During the electrophysiologic study, atrial fibrillation was induced and 3/3 msec shocks of various strengths were delivered between two decapolar defibrillation catheters in the coronary sinus and right atrial appendage. A 2.0-J biphasic shock synchronized to an R wave after a short-long-short ventricular cycle length pattern with a preshock coupling interval of 245 msec induced ventricular fibrillation, which was externally defibrillated with 200 J. This observation has implications for the development of implantable atrial defibrillators. |
| |
Keywords: | internal atrial defibrillation ventricular fibrillation |
|