No embolus in main or segmental pulmonary arteries.
Right coronary artery (RCA) has aberrant origin from left coronary sinus and interarterial course between ascending aorta and right ventricular outflow tract (RVOT).
The left main coronary artery trifurcates into the left anterior descending (LAD) artery, left circumflex (LCx) artery and between them - a ramus intermedius artery.