*Pre-Sports Participation Cardiac Screening Evaluation – A Review DOI: http://dx.doi.org/10.5772/intechopen.102942*

two branches, namely the left anterior descending (LAD) and circumflex. The LAD continues in the same course as the left main CA and traverses in the interventricular groove. The circumflex traverses perpendicular to the axis of the left main CA and keeps on going in the posterior atrioventricular groove. The left CA perfuses the LV and interventricular septum [14, 15]. The right CA originates from the right sinus of Valsalva and continues in the right atrioventricular sulcus and does not branch out similar to the left CA. The right CA supplies the RV [14, 15]. The site of origin and the course of the CAs proximally can easily be demonstrated in echocardiographic studies (**Figures 10** and **11**). Color flow mapping of the CAs (**Figures 11** and **12**) should also be undertaken concurrently to ensure that the parallel lines of the transverse sinus of the pericardium are not mistaken for CAs [16].
