Title: Cardiac resynchronization therapy and implantable cardiac defibrillators in left ventricular systolic dysfunction
Subjects: Therapy, Methods, Left Ventricular Dysfunction, Evidence-Based Medicine, Implantable Defibrillators, Artificial Cardiac Pacing, Meta-Analysis, Implantable cardioverter-defibrillators, Congestive heart failure $x Treatment, Cardiac pacing, Treatment, Congestive heart failure