Development of a fully quantitative approach to the interpretation of stress echocardiography using radial and longitudinal myocardial velocities

摘要: Background: Tissue Doppler may be used to quantify regional left ventricular function but is limited by segmental variation of longitudinal velocity from base apex and free septal walls. We sought overcome this developing a composite radial velocities. Methods Results. examined 82 unselected patients undergoing standard dobutamine echocardiogram. Longitudinal was obtained in the basal mid segments each wall using tissue apical views. Radial velocities were derived same an automated border detection system centerline method with chords grouped according segment location temporally averaged. In 25 at low probability coronary disease, pattern (higher septum) opposite wall) combination homogenous. 57 angiography, abnormal less than normal (6.0 +/- 3.6 vs 9.0 2.2 cm/s, P = .01) 4.0 8.0 3.9 .02). However, permitted better separation (13.3 5.6 17.5 4.2 .001). There no significant difference between accuracy quantitative approach expert visual motion analysis (81% 84%, .56). Conclusion: Regional uni-dimensional myocardial necessitates site-specific ranges, probably because different fiber directions. Combined allows derivation velocity, which homogenous all allow myocardium.