Usefulness of color Doppler proximal isovelocity surface area method in quantitating valvular regurgitation

摘要: Abstract To define the clinical utility of color Doppler proximal isovelocity surface area (PISA) method for estimating regurgitant stroke volume (SV), 160 lesions were evaluated in 104 patients with mitral (MR), aortic (AR), and tricuspid (TR) regurgitation. Regurgitant SV by PISA was calculated as 2πpR 2 × V × (time-velocity integral/peak flow velocity), where R is radius corresponding to first blue-red interface velocity maximal during cardiac cycle. The time-velocity integral peak from continuous-wave recording jet used correct phasic variations flow. Fifteen excluded because difficulty tracing curve. Among 145 remaining lesions, measurable 50 (78%) 64 cases MR 24 (69%) 35 TR but only 12 (26%) 46 AR ( p r  = 0.55; TR: 0.65; 0.70; 0.75;