Inotropic Contractile Reserve and Response to Cardiac Resynchronization Therapy in Patients with Markedly Remodeled Left Ventricle

In patients referred for CRT, ICR was a stronger predictor of response and provided incremental value beyond that of current known predictors of response to CRT (dyssynchrony and QRS duration). Dobutamine stress echocardiography may have an important role in identifying CRT responders, and further multicenter studies are needed to confirm this.