PROCEDURAL SUCCESS RATE OF CARDIAC RESYNCHRONIZATION THERAPY AND DEFIBRILLATOR IMPLANTATION IN HEART FAILURE PATIENTS

Abstract

Objective: To determine the success rate of cardiac resynchronization therapy and defibrillator implantation in
heart failure patients.
Study Design: Descriptive cross sectional study.
Place and Duration of Study: This study was conducted at AFIC-NIHD from 1st Jul 2014 to 31st Dec 2014.
Material and Methods: A total of 45 patients were included in the study that underwent CRT-D implantation.
The procedural success was noted in the catheterization laboratory (cath lab) and in wards, where patients were
managed after CRT-D implantation. Procedural success was based on three criteria: 1) class improvement in
NYHA class, 2) ≥ 5 % improvement in ejection fraction (EF) and 3) conversion of Left bundle branch block (LBBB)
into normal QRS complexes.
Results: Most of patients 15 (33.0%) were between 57-62 years of age. 34 (75.6%) were males and 11 (24.4%)
females. the mean age of the patients was 53.6 ± 7.8 years (range 35 - 67 years).
Pre-procedure mean EF was 24.71% and post procedure mean EF was 31.33%. Prior to procedure 33 (73.3%)
patients were in NYHA Class III and 12 patients (26.7%) were in NYHA Class IV. 93.0% patients showed
improvement in NYHA class. EF improved in 93.0% patients and 89.1% patients converted to normal QRS
complexes after CRT-D implantation. The overall combined success rate was 93.0%.
Conclusion: The procedural success rate of CRT-D was high and should be offered to the patients with heart
failure who are non responder to medical treatment whenever the facility is available.