Association between Clinical Parameters and CRT Response

Background: CRT is indicated for patients with severely impaired left ventricular systolic function and ventricular dyssynchrony who remain symptomatic despite optimal medical therapy. CRT is an expensive treatment with a significant non-responder rate. Objective: To ensure appropriate use of this treatment modality, we decided to investigate whether clinical parameters can predict response to CRT in our patients. Methods: We retrospectively reviewed all CRT patients under responder based on pre-specified ECHO and clinical criteria. An ECHO response would be: relative improvement from baseline left ventricular ejection fraction (EF) of N 15%; and a decrease in End Diastolic Volume index (EDVi) or End Systolic Volume index (ESVi) of N 15%. Clinical response was defined as an improvement of at least 1 NYHA functional class. Patients who fulfil both ECHO and clinical criteria are considered responders our follow-up since 2014. We classified them as responder or non.