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The Efficacy of Implantable Cardioverter-Defibrillators in Heart Transplant Recipients Results From a Multicenter Registry
The Efficacy of Implantable Cardioverter-Defibrillators in Heart Transplant Recipients Results From a Multicenter Registry CIRCULATION-HEART FAILURE Tsai, V. W., Cooper, J., Garan, H., Natale, A., Ptaszek, L. M., Ellinor, P. T., Hickey, K., Downey, R., Zei, P., Hsia, H., Wang, P., Hunt, S., Haddad, F., Al-Ahmad, A. 2009; 2 (3): 197-201Abstract
Sudden cardiac death among orthotopic heart transplant recipients is an important mechanism of death after cardiac transplantation. The role for implantable cardioverter-defibrillators (ICDs) in this population is not well established. This study sought to determine whether ICDs are effective in preventing sudden cardiac death in high-risk heart transplant recipients.We retrospectively analyzed the records of all orthotopic heart transplant patients who had ICD implantation between January 1995 and December 2005 at 5 heart transplant centers. Thirty-six patients were considered high risk for sudden cardiac death. The mean age at orthotopic heart transplant was 44+/-14 years, the majority being male (n=29). The mean age at ICD implantation was 52+/-14 years, whereas the average time from orthotopic heart transplant to ICD implant was 8 years +/-6 years. The main indications for ICD implantation were severe allograft vasculopathy (n=12), unexplained syncope (n=9), history of cardiac arrest (n=8), and severe left ventricular dysfunction (n=7). Twenty-two shocks were delivered to 10 patients (28%), of whom 8 (80%) received 12 appropriate shocks for either rapid ventricular tachycardia or ventricular fibrillation. The shocks were effective in terminating the ventricular arrhythmias in all cases. Three (8%) patients received 10 inappropriate shocks. Underlying allograft vasculopathy was present in 100% (8 of 8) of patients who received appropriate ICD therapy.Use of ICDs after heart transplantation may be appropriate in selected high-risk patients. Further studies are needed to establish an appropriate prevention strategy in this population.
View details for DOI 10.1161/CIRCHEARTFAILURE.108.814525
View details for Web of Science ID 000269161600007
View details for PubMedID 19808340