Usefulness of Echocardiographic Dyssynchrony in Patients With Borderline QRS Duration to Assist With Selection for Cardiac Resynchronization Therapy
Keywords: echocardiography; Doppler ultrasound; heart failure; pacing therapyCRT, cardiac resynchronization therapy; EF, ejection fraction; FT/RR, filling time ratio; IVMD, interventricular mechanical delay; LV, left ventricular; PED, pre-ejection delay