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Figure 1 Assessment of Ventricular Geometry and Sampling Sites for TDI Measurements
Echocardiographic parasternal short-axis images from a Senning-operated patient with transposition of the great arteries demonstrating (A) measurements for calculation of the ratio between systolic right (RVd) and left ventricular internal diameter (LVd), and (B) assessment of radius of curvature (r). Panels C and D show sampling sites for strain and strain rate measurements in the apical 4-chamber and parasternal short-axis view (only free wall midventricular sampling sites shown). IVS = interventricular septum; LV = left ventricle; RV = right ventricle; TDI = tissue Doppler imaging; V = probe orientation marker.
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