Continuity equation and Gorlin formula compared with directly observed orifice area in native and prosthetic aortic valves.
نویسندگان
چکیده
منابع مشابه
Doppler Assessment of Prosthetic Valve Orifice Area
Background. Although Doppler echocardiography has been shown to be accurate in assessing stenotic orifice areas in native valves, its accuracy in evaluating the prosthetic valve orifice area remains undetermined. Methods and Results. Doppler-estimated valve areas were studied for their agreement with catheterderived Gorlin effective orifice areas and their flow dependence in five sizes (19/20-2...
متن کاملDoppler assessment of prosthetic valve orifice area. An in vitro study.
BACKGROUND Although Doppler echocardiography has been shown to be accurate in assessing stenotic orifice areas in native valves, its accuracy in evaluating the prosthetic valve orifice area remains undetermined. METHODS AND RESULTS Doppler-estimated valve areas were studied for their agreement with catheter-derived Gorlin effective orifice areas and their flow dependence in five sizes (19/20-...
متن کاملWhat do you mean by aortic valve area: geometric orifice area, effective orifice area, or gorlin area?
Aortic valve area can be measured by cardiac catheterization, Doppler echocardiography, or imaging planimetry to assess aortic stenosis severity. These diagnostic techniques provide the Gorlin area, the effective orifice area (EOA) and the geometric orifice area (GOA), respectively. The differences between these three parameters depend mainly on the valve inflow shape and cross-sectional area o...
متن کاملDependence of Gorlin formula and continuity equation valve areas on transvalvular volume flow rate in valvular aortic stenosis.
BACKGROUND Valve areas derived by the Gorlin formula have been observed to vary with transvalvular volume flow rate. Continuity equation valve areas calculated from Doppler-echo data have become a widely used alternate index of stenosis severity, but it is unclear whether continuity equation valve areas also vary with volume flow rate. This study was designed to investigate the effects of chang...
متن کاملProsthetic Aortic Heart Valves
In this review, the anatomy and structure of the aortic valve and its prostheses are comprehensively discussed. Cardiac anatomy and function, human heart valves and their prostheses are also extensively discussed. The current status of prosthetic heart valves along with the next generation of these devices is broadly deliberated. Ather promising options such astranscatheter technologies (percut...
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ژورنال
عنوان ژورنال: Heart
سال: 1992
ISSN: 1355-6037
DOI: 10.1136/hrt.67.2.193