title: Letter in reference to: Prospective comparison of echocardiographic atrioventricular delay optimization methods for cardiac resynchronization therapy.
authors.forename: Raul
authors.initials: R
authors.lastname: Chirife
mesh_terms: D001283:Atrioventricular Node / Q000000981:diagnostic imaging / Q000503:physiopathology*; D002304:Cardiac Pacing, Artificial / Q000379:methods; D015150:Echocardiography, Doppler; D004562:Electrocardiography; D006333:Heart Failure / Q000000981:diagnostic imaging* / Q000503:physiopathology / Q000628:therapy*; D006801:Humans; D011446:Prospective Studies; D012107:Research Design; D013997:Time Factors; D016896:Treatment Outcome