Left Ventricular Dynamics after Aortic Valve Replacement: A Long-term, Combined Radionuclide Angiographic and Ultrasonographic Study

AUTOR(ES)

Masotti, Claudio S.

RESUMO

Between January 1985 and July 1990, we studied 71 patients at our institution who underwent aortic valve replacement for either aortic valve regurgitation (40 patients) or stenosis (31 patients). The following prostheses were implanted: 25 St. Jude Medical valves (bileaflet), 16 Björk-Shiley (monoleaflet, tilting disc, 60° convexo-concave), 16 Medtronic-Hall (monoleaflet, tilting disc), and 14 Starr-Edwards (caged ball). The patients were evaluated pre-and postoperatively by means of gated blood-pool scintigraphy and Doppler echocardiography. Postoperatively, each patient was studied at 6 months, 1 year, and then annually. The evaluations focused upon 1) scintigraphically assessed left ventricular performance indicators (end-diastolic and end-systolic volume, as well as resting and exercise ejection fraction) and 2) Doppler-derived hemodynamic indexes (peak and mean transvalvular pressure gradient, effective orifice area, regurgitant flow, and systolic wall stress).

Documentos Relacionados

• Determinants of Long-term Survival after Isolated Aortic Valve Replacement: A 10- to 17-Year Follow-up
• Left ventricular function early after aortic valve replacement for aortic regurgitation: Assessment by gated radionuclide ventriculography
• Left ventricular function after aortic valve replacement.
• Long-term results after left ventricular aneurysmectomy.
• Severe aortic stenosis without left ventricular hypertrophy: prevalence, predictors, and short-term follow up after aortic valve replacement.