Cardiac resynchronization therapy.
D002303:Cardiac Output, Low / Q000175:diagnosis / Q000000981:diagnostic imaging / Q000628:therapy*; D002304:Cardiac Pacing, Artificial; D015150:Echocardiography, Doppler; D006801:Humans; D016896:Treatment Outcome; D016277:Ventricular Function, Left; D020257:Ventricular Remodeling