Clinical Application of Implantable Cardioverter Defibrilators

Transvenous implantable cardioverter defibrillator(ICD) was applied to the treatment of ventricular tachyarrhythmias. Method: Four patients were with structural heart disease and had history of ventricular tachycardia or ventricular fibrillation (VT/VF). Their ICDs were implanted transvenously. Results: In the follow-up survey, 19 postimplantation ventricular tachyarrhythmias were converted successfully to sinus rhythm by 20 J shock or antitachycardia pacing (ATP). No postoperative complication occurred. Conclusion: ICD has high efficacy for refractory ventricular tachyarrhythmias, isoproterenol is valuable in inducing VT/VF among some patients, reasonable resetting ICD parameters and drug therapy are needed in order to improve the functions of ICD and to save the energy of ICD.