Effective aortic regurgitant orifice area: description of a method based on the conservation of mass.

摘要: The natural history of aortic regurgitation is incompletely understood in part because the lack a simple method to estimate defect size. A determining effective regurgitant orifice area that combines Doppler catheter and echocardiographic techniques based on principle conservation mass (the continuity equation) described. To validate application system for measuring supravalvular diastolic flow, an vitro model retrograde flow was used. These studies indicated measurements velocity with accurately reflect when aorta less than 4.8 cm diameter. Twenty-three patients undergoing cardiac catheterization were studied; 20 these had regurgitation. Retrograde determined from positioned above valve. calculated use catheter-derived volume mean transvalvular as by either or continuous wave echocardiography. catheterization-derived increased angiographic grade follows: 1+ (0.04 0.10 cm2), 2+ (0.15 0.49 3+ (0.29 1.11 cm2) 4+ (1.24 1.33 cm2). By combining catheter, techniques, may be estimated; this hydrodynamic correlates grading aortography. Calculation provides quantitative alternative aortography estimating severity but should used caution markedly dilated aorta.