Clinical effectiveness of cardiac resynchronization therapy versus medical therapy alone among patients with heart failure: analysis of the ICD Registry and ADHERE.


Conference Paper

BACKGROUND: Cardiac resynchronization therapy with defibrillator (CRT-D) reduces morbidity and mortality among selected patients with heart failure in clinical trials. The effectiveness of this therapy in clinical practice has not been well studied. METHODS AND RESULTS: We compared a cohort of 4471 patients from the National Cardiovascular Data Registry's Implantable Cardioverter-Defibrillator (ICD) Registry hospitalized primarily for heart failure and who received CRT-D between April 1, 2006, and December 31, 2009, to a historical control cohort of 4888 patients with heart failure without CRT-D from the Acute Decompensated Heart Failure National Registry (ADHERE) hospitalized between January 1, 2002, and March 31, 2006. Both registries were linked with Medicare claims to evaluate longitudinal outcomes. We included patients from the ICD Registry with left ventricular ejection fraction ≤35% and QRS duration ≥120 ms who were admitted for heart failure. We used Cox proportional hazards models to compare outcomes with and without CRT-D after adjustment for important covariates. After multivariable adjustment, CRT-D was associated with lower 3-year risks of death (hazard ratio, 0.52; 95% confidence interval, 0.48-0.56; P<0.001), all-cause readmission (hazard ratio, 0.69; 95% confidence interval, 0.65-0.73; P<0.001), and cardiovascular readmission (hazard ratio, 0.60; 95% confidence interval, 0.56-0.64; P<0.001). The association of CRT-D with mortality did not vary significantly among subgroups defined by age, sex, race, QRS duration, and optimal medical therapy. CONCLUSIONS: CRT-D was associated with lower risks of mortality, all-cause readmission, and cardiovascular readmission than medical therapy alone among patients with heart failure in community practice.

Full Text

Duke Authors

Cited Authors

  • Khazanie, P; Hammill, BG; Qualls, LG; Fonarow, GC; Hammill, SC; Heidenreich, PA; Al-Khatib, SM; Piccini, JP; Masoudi, FA; Peterson, PN; Curtis, JP; Hernandez, AF; Curtis, LH

Published Date

  • November 2014

Published In

Volume / Issue

  • 7 / 6

Start / End Page

  • 926 - 934

PubMed ID

  • 25227768

Pubmed Central ID

  • 25227768

Electronic International Standard Serial Number (EISSN)

  • 1941-3297

Digital Object Identifier (DOI)

  • 10.1161/CIRCHEARTFAILURE.113.000838

Conference Location

  • United States