Answer to Call of Duty
Correct answer is B. In 85% of cases, the posterior interventricular artery arises from a continuation of the right coronary artery indicated by label 2. 1 = Right marginal artery; 3 = Unnamed artery; 4 is another unnamed artery, but from the left coronary artery; 5 = Left anterior descending.
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Answer to this question is based on material presented in lectures 11 of the Thorax Lecture Series.
= Right marginal a.
= Right coronary a.
= Unnamed a.
= Diagonal a.
= Anterior interventricular a. (LAD)