title: [M-mode and two-dimensional echocardiography of heart valve prosthesis dysfunction].
abstract: The diagnostic efficacy of M-Mode and 2-d echocardiography for the detection of malfunctioning prosthetic valves was studied in twenty-nine patients with prosthetic valves and clinical deterioration. Echocaradiographic abnormalities were found in 8 of 12 patients with confirmed valve dysfunction; 30.8% of the cases had false negative echo tracings. In 17 patients with normal echocardiographic pictures of the valves another cause of clinical deterioration was found (congestive heart failure, pericardial effusion, aneurysm of aortic root). In this study M-Mode and 2-d echocardiography had an excellent diagnostic accuracy rate in distinguishing congestive heart failure from valve dysfunction. Comparing the data of M-Mode and 2-d registration, both methods are found to be complementary. A major advantage of the 2-d echocardiography is its enhanced spatial orientation, whereas M-Mode echocardiography enables better evaluation of valve movements and corresponding time intervals and recognition of quick movements and fibrillations.
authors.affiliation: I. Med. Univ. Klinik Wien.
authors.forename: R
authors.initials: R
authors.lastname: Mörz
authors.forename: G
authors.initials: G
authors.lastname: Kronik
authors.forename: H
authors.initials: H
authors.lastname: Mösslacher
mesh_terms: D001021:Aortic Valve / Q000000981:diagnostic imaging / Q000601:surgery; D001705:Bioprosthesis; D003937:Diagnosis, Differential; D004452:Echocardiography; D006350:Heart Valve Prosthesis; D006801:Humans; D008943:Mitral Valve / Q000000981:diagnostic imaging / Q000601:surgery; D011183:Postoperative Complications / Q000000981:diagnostic imaging*; D011474:Prosthesis Design; D011475:Prosthesis Failure; D012680:Sensitivity and Specificity