LAD, Circ & RCA. The three major arteries of the heart are the left anterior descending, lad, the circumflex and the right coronary artery, rca.
Exam tomorrow? . The left main divides into the left anterior descending and left circumflex. The lad has diagonals and septal perforators. The circumflex has marginal (aka lateral) branches. If the circulation is left dominant (in 10-20% of normals), the posterior descending artery (pda) also arises from the lcx. The right coronary has atrial branches, rv marginals, the PDA and lv posterior branches.
Left main. Gives rise to left anterior descending and circumflex & right coronary artery.