@article {516296, title = {Characteristics and outcomes of patients receiving new and replacement implantable cardioverter-defibrillators: results from the NCDR}, journal = {Circ Cardiovasc Qual Outcomes}, volume = {6}, number = {4}, year = {2013}, month = {2013 Jul}, pages = {488-97}, abstract = {BACKGROUND: Little is known about the clinical features, procedural risks, or survival of patients receiving replacement versus new implantable cardioverter-defibrillators (ICDs). METHODS AND RESULTS: Entries in the National Cardiovascular Data Registry (NCDR) ICD Registry from 2005 through 2010 were eligible for inclusion (n=463,978). Baseline demographic data, clinical information, and procedural variables were compared between patients receiving new (n=359,993; 77.6\%) and replacement (n=103,985; 22.4\%) ICDs and entered into a propensity match model to determine adjusted survival rates. Patients receiving replacement ICDs were older (70.7 versus 67.5 years of age) and more likely to have atrial fibrillation (41.8\% versus 31.4\%; P, keywords = {Age Factors, Aged, Aged, 80 and over, Arrhythmias, Cardiac, Death, Sudden, Cardiac, Defibrillators, Implantable, Device Removal, Electric Countershock, Female, Humans, Kaplan-Meier Estimate, Logistic Models, Male, Middle Aged, Propensity Score, Prosthesis Failure, Registries, Risk Factors, Time Factors, Treatment Outcome, United States}, issn = {1941-7705}, doi = {10.1161/CIRCOUTCOMES.111.000054}, author = {Kramer, Daniel B and Kennedy, Kevin F and Noseworthy, Peter A and Buxton, Alfred E and Josephson, Mark E and Normand, Sharon-Lise and Spertus, John A and Zimetbaum, Peter J and Reynolds, Matthew R and Mitchell, Susan L} }