Question

a cardiac mri indicates damage to interventricular septum and posterior walls of both ventricles. which blood vessel is likely blocked?
posterior interventricular artery
anterior interventricular artery
marginal artery
circumflex artery

Explanation:

The posterior interventricular artery supplies blood to the interventricular septum and the posterior walls of both ventricles. If it is blocked, it can lead to damage in these areas as indicated by the MRI. The anterior interventricular artery mainly supplies the anterior part of the ventricles and interventricular septum. The marginal artery supplies the marginal part of the ventricles. The circumflex artery supplies the left atrium and the posterior - lateral aspect of the left ventricle.

Answer:

Posterior interventricular artery