[Grading of the aortic valve regurgitation with the color Doppler echocardiography]. / Zur Schweregradbeurteilung von Aortenklappenregurgitationen mit Hilfe der Farb-Doppler-Echokardiographie.

This study was undertaken to assess whether various parameters of the extension of aortic regurgitation with color Doppler imaging are comparable with angiographic techniques for classification of severity. In 39 patients with aortic regurgitation, 14 women and 25 men, mean age 53 +/- 14 years, Doppler echocardiographic examinations were performed prospectively for determination of length, width and area of the maximal extension of regurgitant flow (Figure 1). Angiographic assessment of severity showed grade I regurgitation in nine, grade II in 14, grade III in twelve, and grade IV in four patients. The length of regurgitant flow in the color Doppler image showed an increasing tendency with increasing angiographic severity (r = 0.38, SEE = 13 mm), however, for various grades of severity, there was clear overlap. The area of regurgitation, similarly, due to substantial overlap, correlated only weakly with the angiographic data (r = 0.54, SEE = 196 mm2). To date, there is not theoretical basis for a correlation of the length and area of regurgitant flow with the severity and experimental studies have shown that there is no simple relationship. The best correlation was found for the width of the regurgitant flow (r = 0.63, SEE = 3 mm), however, here as well, there was clear overlap of data such that there was no statistically significant difference between grades II and III. Unequivocal differentiation of the values could only be achieved between grades I and IV. Based on a width of 7 mm, high-grade regurgitation could be detected with a sensitivity of 75% and a specificity of 74%.(ABSTRACT TRUNCATED AT 250 WORDS)