Characteristics of heart failure patients associated with good and poor response to cardiac resynchronization therapy: a PROSPECT (Predictors of Response to CRT) sub-analysis
Open Access
- 30 August 2009
- journal article
- clinical trial
- Published by Oxford University Press (OUP) in European Heart Journal
- Vol. 30 (20), 2470-2477
- https://doi.org/10.1093/eurheartj/ehp368
Abstract
Predictors of Response to Cardiac Resynchronization Therapy (CRT) (PROSPECT) was the first large-scale, multicentre clinical trial that evaluated the ability of several echocardiographic measures of mechanical dyssynchrony to predict response to CRT. Since response to CRT may be defined as a spectrum and likely influenced by many factors, this sub-analysis aimed to investigate the relationship between baseline characteristics and measures of response to CRT. A total of 286 patients were grouped according to relative reduction in left ventricular end-systolic volume (LVESV) after 6 months of CRT: super-responders (reduction in LVESV ≥30%), responders (reduction in LVESV 15–29%), non-responders (reduction in LVESV 0–14%), and negative responders (increase in LVESV). In addition, three subgroups were formed according to clinical and/or echocardiographic response: +/+ responders (clinical improvement and a reduction in LVESV ≥15%), +/− responders (clinical improvement or a reduction in LVESV ≥15%), and −/− responders (no clinical improvement and no reduction in LVESV ≥15%). Differences in clinical and echocardiographic baseline characteristics between these subgroups were analysed. Super-responders were more frequently females, had non-ischaemic heart failure (HF), and had a wider QRS complex and more extensive mechanical dyssynchrony at baseline. Conversely, negative responders were more frequently in New York Heart Association class IV and had a history of ventricular tachycardia (VT). Combined positive responders after CRT (+/+ responders) had more non-ischaemic aetiology, more extensive mechanical dyssynchrony at baseline, and no history of VT. Sub-analysis of data from PROSPECT showed that gender, aetiology of HF, QRS duration, severity of HF, a history of VT, and the presence of baseline mechanical dyssynchrony influence clinical and/or LV reverse remodelling after CRT. Although integration of information about these characteristics would improve patient selection and counselling for CRT, further randomized controlled trials are necessary prior to changing the current guidelines regarding patient selection for CRT.This publication has 34 references indexed in Scilit:
- Results of the Predictors of Response to CRT (PROSPECT) TrialCirculation, 2008
- Comparison of Echocardiographic Dyssynchrony Assessment by Tissue Velocity and Strain Imaging in Subjects With or Without Systolic Dysfunction and With or Without Left Bundle-Branch BlockCirculation, 2008
- The Effect of Cardiac Resynchronization on Morbidity and Mortality in Heart FailureThe New England Journal of Medicine, 2005
- Left ventricular dyssynchrony predicts response and prognosis after cardiac resynchronization therapyJournal of the American College of Cardiology, 2004
- Tissue Doppler Imaging Is Superior to Strain Rate Imaging and Postsystolic Shortening on the Prediction of Reverse Remodeling in Both Ischemic and Nonischemic Heart Failure After Cardiac Resynchronization TherapyCirculation, 2004
- Cardiac-Resynchronization Therapy with or without an Implantable Defibrillator in Advanced Chronic Heart FailureThe New England Journal of Medicine, 2004
- Echocardiographic Modeling of Cardiac Dyssynchrony Before and During Multisite Stimulation: A Prospective StudyPacing and Clinical Electrophysiology, 2003
- Cardiac resynchronization therapy tailored by echocardiographic evaluation of ventricular asynchronyJournal of the American College of Cardiology, 2002
- Tissue doppler imaging predicts improved systolic performance and reversed left ventricular remodeling during long-term cardiac resynchronization therapyJournal of the American College of Cardiology, 2002
- Cardiac Resynchronization in Chronic Heart FailureThe New England Journal of Medicine, 2002