title: Usefulness of dobutamine echocardiography in the hemodynamic assessment of mechanical prostheses in the aortic valve position.
abstract: Dobutamine stress echocardiography is a simple, safe, and readily available method to evaluate prosthetic valve hemodynamics under various flow conditions. A normal response of aortic valve prostheses to dobutamine infusion is a 100% increment in transprosthetic pressure gradients with an unchanged valve area.
authors.affiliation: Department of Medicine/Cardiology, The University of Texas Health Science Center at San Antonio, 78284-7872, USA.
authors.forename: M
authors.initials: M
authors.lastname: Zabalgoitia
authors.forename: K
authors.initials: K
authors.lastname: Kopec
authors.forename: D A
authors.initials: DA
authors.lastname: Abochamh
authors.forename: L
authors.initials: L
authors.lastname: Oneschuk
authors.forename: C J
authors.initials: CJ
authors.lastname: Herrera
authors.forename: R A
authors.initials: RA
authors.lastname: O'Rourke
mesh_terms: D000318:Adrenergic beta-Agonists; D000368:Aged; D001021:Aortic Valve / Q000000981:diagnostic imaging* / Q000503:physiopathology* / Q000601:surgery; D004280:Dobutamine; D015150:Echocardiography, Doppler / Q000379:methods; D005260:Female; D006350:Heart Valve Prosthesis; D006439:Hemodynamics; D006801:Humans; D008297:Male; D008875:Middle Aged; D011237:Predictive Value of Tests
chemical_list: D000318:Adrenergic beta-Agonists; D004280:Dobutamine