Predictors of spontaneous reverse remodeling in mild heart failure patients with left ventricular dysfunction.

Abstract

BACKGROUND:

There are limited data regarding factors associated with spontaneous left ventricular reverse remodeling (S-LVRR) among mildly symptomatic heart failure (HF) patients and its prognostic implications on clinical outcomes.

METHODS AND RESULTS:

Best subsets logistic regression analysis was used to identify factors associated with S-LVRR (defined as ≥15% reduction in left ventricular end-systolic volume at 1-year of follow-up) among 612 patients treated with internal cardioverter defibrillator-only therapy in Multicenter Automatic Defibrillator Implantation Trial-Cardiac Resynchronization Therapy (MADIT-CRT) and to create a score for the prediction of S-LVRR. Cox proportional hazards regression modeling was used to assess the clinical outcome of all internal cardioverter defibrillator-only patients (n=714) with a high S-LVRR score. S-LVRR occurred in 25% of internal cardioverter defibrillator-only patients. Predictors of S-LVRR included systolic blood pressure≥140 mm Hg, serum creatinine<1.0 mg/dL, QRS 130 to 160 ms, and nonischemic cardiomyopathy. Multivariate analysis showed that each 1-point increment in S-LVRR score (range, 0-7) was associated with an 11% (P=0.019) reduction in the risk of HF or death. Treatment with cardiac resynchronization therapy was associated with a significant reduction in the risk of HF or death only among internal cardioverter defibrillator-treated patients with a low (Q1-3) S-LVRR score (hazard ratio=0.55; P<0.001), but not among those with a higher (Q4) score (hazard ratio=1.06; P=0.72).

CONCLUSIONS:

Our data suggest that approximately one quarter of mild HF patients eligible for biventricular pacing experience S-LVRR. Combined assessment of clinical factors associated with S-LVRR can be used to identify mild HF patients with a low risk for clinical events without cardiac resynchronization therapy intervention.

CLINICAL TRIAL REGISTRATION URL:

http://www.clinicaltrials.gov. Unique identifier: NCT00180271.

• Authors: Andrew Brenyo, Alon Barsheshet, Valentina Kutyifa, Anne-Christine Ruwald, Mohan Rao, Wojciech Zareba, Anne-Catherine Pouleur, Dorit Knappe, Scott D Solomon, Scott McNitt, David T Huang, Arthur J Moss, Ilan Goldenberg
• Journal: Circulation. Heart failure (Circ Heart Fail) Vol. 7 Issue 4 Pg. 565-72 (Jul 2014) ISSN: 1941-3297 [Electronic] United States
• PMID: 24786217 (Publication Type: Journal Article, Multicenter Study, Randomized Controlled Trial, Research Support, Non-U.S. Gov't)
• Copyright: © 2014 American Heart Association, Inc.

Topics

• Aged
• Canada (epidemiology)
• Defibrillators, Implantable
• Echocardiography
• Europe (epidemiology)
• Female
• Heart Failure (mortality, physiopathology, therapy)
• Heart Ventricles (diagnostic imaging, physiopathology)
• Humans
• Male
• Middle Aged
• Prognosis
• Risk Factors
• Stroke Volume (physiology)
• Survival Rate (trends)
• United States (epidemiology)
• Ventricular Dysfunction, Left (mortality, physiopathology, therapy)
• Ventricular Remodeling