Step 3: delineation of the left anterior descendent artery course.
Panel A : The ICE probe is positioned at the base of the RVOT with the beam directed upwards visualizing the space between the two semilunar valves and arterial roots. This is the tract where the LAD is closest to the PA. Only LPC is displayed. Panel B : with slight counterclockwise rotations it is possible to follow the entire course of the LAD until its medial (exceptionally the distal) tract evaluating its proximity with the LPC. ICE: intracardiac echocardiography, RVOT: right ventricle outflow tract, LAD: left anterior descendent (artery), PA: pulmonary artery, LPC: left pulmonary cusp.