Infarction of the posterior half of the interventricular septum is caused by an occlusion of the:
A) Main trunk of the left coronary artery
B) Anterior descending branch of the left coronary artery
C) Circumflex branch of the left coronary artery
D) Right coronary artery
E) Coronary sinus

Question

Quizplus · Accepted Answer

The posterior half of the interventricular septum is typically supplied by the posterior descending artery, which in most individuals (about 70-80%) is a branch of the right coronary artery. Occlusion of the right coronary artery can therefore lead to infarction of this area.

Infarction of the Posterior Half of the Interventricular Septum Is