Ontology highlight
ABSTRACT: Background
Cardiac resynchronization therapy (CRT) devices reduce mortality through pacing-induced cardiac resynchronization and implantable cardioverter defibrillator (ICD) therapy for ventricular arrhythmias (VAs). Whether certain factors can predict if patients will benefit more from implantation of CRT pacemakers (CRT-P) or CRT defibrillators (CRT-D) remains unclear.Methods and results
We followed 305 primary prevention CRT-D recipients for the two primary outcomes of HF hospitalization and ICD therapy for VAs. Serum biomarkers, electrocardiographic and clinical variables were collected prior to implant. Multivariable analysis using Cox-proportional hazards model was used to fit the final models. Among 282 patients with follow-up outcome data, 75 (26.6%) were hospitalized for HF and 31 (11%) received appropriate ICD therapy. Independent predictors of HF hospitalization were atrial fibrillation (HR = 1.8 (1.1,2.9)), NYHA class III/IV (HR = 2.2 (1.3,3.6)), ejection fraction <20% (HR = 1.7 (1.1,2.7)), HS-IL6 >4.03pg/ml (HR = 1.7 (1.1,2.9)) and hemoglobin (<12g/dl) (HR = 2.2 (1.3,3.6)). Independent predictors of appropriate therapy included BUN >20mg/dL (HR = 3.0 (1.3,7.1)), HS-CRP >9.42mg/L (HR = 2.3 (1.1,4.7)), no beta blocker therapy (HR = 3.2 (1.4,7.1)) and hematocrit ?38% (HR = 2.7 (1.03,7.0)). Patients with 0-1 risk factors for appropriate therapy (IR 1 per 100 person-years) and ?3 risk factors for HF hospitalization (IR 23 per 100-person-years) were more likely to die prior to receiving an appropriate ICD therapy.Conclusions
Clinical and biomarker data can risk stratify CRT patients for HF progression and VAs. These findings may help characterize subgroups of patients that may benefit more from the use of CRT-P vs. CRT-D systems.Trial registration
ClinicalTrials.gov NCT00733590.
SUBMITTER: Nauffal V
PROVIDER: S-EPMC5384669 | biostudies-literature | 2017
REPOSITORIES: biostudies-literature
Nauffal Victor V Zhang Yiyi Y Tanawuttiwat Tanyanan T Blasco-Colmenares Elena E Rickard John J Marine Joseph E JE Butcher Barbara B Norgard Sanaz S Dickfeld Timm-Michael TM Ellenbogen Kenneth A KA Guallar Eliseo E Tomaselli Gordon F GF Cheng Alan A
PloS one 20170407 4
<h4>Background</h4>Cardiac resynchronization therapy (CRT) devices reduce mortality through pacing-induced cardiac resynchronization and implantable cardioverter defibrillator (ICD) therapy for ventricular arrhythmias (VAs). Whether certain factors can predict if patients will benefit more from implantation of CRT pacemakers (CRT-P) or CRT defibrillators (CRT-D) remains unclear.<h4>Methods and results</h4>We followed 305 primary prevention CRT-D recipients for the two primary outcomes of HF hosp ...[more]