title: [Echocardiographic study of valvular prosthesis].
abstract: Eighty-six patients with valvular prosthesis (PV) were included in this study, 52 females and 34 males, from 9 to 55 years of age. The functional state of the PV was corroborated with catheterization, surgery or necropsy. The results of 92 PV were analyzed, of which 72 were in mitral position, including 49 dura mater valves (DMPV). In aortic position were 18, including 12 mechanical Bjork-Shilley (BS) and 2 in tricuspid position. The prostheses were classified in three groups: I. with regurgitation, II. with obstruction and III. without dysfunction. Of the 49 DMPV in mitral position 11 were in group I and 7 in group II. The echocardiogram revealed a diminished opening velocity in group II (255 +/- 41.2 mm/sec., P less than 0.001) as well as a diminished opening excursion (10.9 +/- 3.4 mm, P less than 0.02) and increased thickness of the leaflets (4.7 +/- 3.6 mm, P less than 0.05). Paradoxical interventricular septal movement was less frequent in group I (27.2%, P less than 0.05). Seventeen BS valves were in mitral position; of these 2 were classified in group I and the rest in group III, the opening velocity was increased (1200 mm/sec) in those of group I. None of the BS valves in aortic position were dysfunctional. No patients from group III died; mortality in groups I and II was 35%. In 5.1% of group III and 20% of groups I and II either no improvement or greater clinical deterioration was observed.
authors.forename: R
authors.initials: R
authors.lastname: Delong
authors.forename: L
authors.initials: L
authors.lastname: Agurruza
authors.forename: J G
authors.initials: JG
authors.lastname: Esquivel-Avila
authors.forename: E
authors.initials: E
authors.lastname: Juan
authors.forename: J L
authors.initials: JL
authors.lastname: Arenas
authors.forename: C
authors.initials: C
authors.lastname: Friedland
mesh_terms: D000293:Adolescent; D000328:Adult; D001021:Aortic Valve; D002648:Child; D004452:Echocardiography; D004868:Equipment Failure; D005069:Evaluation Studies as Topic; D005260:Female; D006350:Heart Valve Prosthesis; D006801:Humans; D008297:Male; D008875:Middle Aged; D008943:Mitral Valve; D014261:Tricuspid Valve
vernacular_title: Estudio ecocardiográfico de las prótesis valvulares.