title: Valve surgery at the Hospital de Cardiología y Neumología del Centro Médico Nacional IMSS.
abstract: From January 1964 until February 1985, we performed 8,370 prosthetic valve procedures; this represents 54.32% of our total surgical load. Approximately 93% of the replacements were for rheumatic valve disease; the rest were for ischemic, myxomatous, degenerative, congenital, and traumatic heart disease. All cases were between New York Heart Association (NYHA) Classes II and IV; almost all patients had heart catheterizations before surgery. During the last 6 years, all patients had echocardiograms before undergoing heart catheterization.
authors.affiliation: Division of Surgery, Hospital de Cardiología y Neumología, National Medical Center, Mexican Social Security Institute, Mexico City.
authors.forename: R
authors.initials: R
authors.lastname: Martínez-Banuet
authors.forename: X
authors.initials: X
authors.lastname: Maulén-Radován
authors.forename: C
authors.initials: C
authors.lastname: Ibarra-Pérez
authors.forename: C
authors.initials: C
authors.lastname: Díaz-Devis
authors.forename: F
authors.initials: F
authors.lastname: Ramírez-Godínez
authors.forename: X
authors.initials: X
authors.lastname: Palacios-Macedo