fig67

Figure 67. Echo-Doppler studies in short-axis views near the aortic sinuses demonstrating the origin and course of the left (LCA) (A, B) and right (RCA) (C, D) coronary arteries (CAs). The LCA stays the same course to become the left anterior descending artery (LAD). The circumflex (CIRC) traverses perpendicular to the axis of LCA. Color within the CAs is shown in (B) and (D) and is required to ensure that these indeed are coronary arteries and not parallel lines of the transverse sinus of the pericardium. Ao: Aorta.