Research of predictive factors for cardiac resynchronization therapy: a prospective study comparing data from phase-analysis of gated myocardial perfusion single-photon computed tomography and echocardiography

Background Cardiac resynchronization therapy (CRT) reduces morbidity and mortality in chronic systolic heart failure. About 20% of implanted patients are considered as “non-responders”. This study aimed to evaluate gated myocardial perfusion single-photon emission computed tomography (GMPS) phase parameters as compared to echocardiography in the assessment of predictors for response to CRT before and after CRT activation.