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Chapter 2. Coronary Anatomy for the Interventionalist

The coronary microvasculature is defined as:

A. Arterioles that measure less than 200 μm in diameter and are easily visualized on conventional coronary angiography.

B. Arterioles that measure less than 200 μm in diameter and are not visualized on conventional coronary angiography.

C. Arterioles that measure greater than 200 μm in diameter and are easily visualized on conventional coronary angiography.

D. Arterioles that supply deoxygenated blood to the myocardium.

E. Arterioles that are unable to vasodilate or vasoconstrict in response to stimuli.

The correct answer is B.

The right coronary artery:

A. Originates from the left sinus of Valsalva.

B. Gives off the conus artery in 90% of cases, whereas the conus artery originates from a separate ostium in the other 10% of cases.

C. Gives off the sinoatrial nodal artery in 90% of cases.

D. Gives off the conus artery, which may be an important source of collaterals to an occluded left anterior descending artery.

E. Gives off the posterior descending branch in 10% of cases.

The correct answer is D.

Myocardial bridging:

A. Has been reported in 40% to 80% of autopsy cases.

B. Is an acquired variant that can develop in any coronary artery.

C. Is best diagnosed with coronary angiography.

D. Causes symptoms in most cases.

E. Is most commonly treated with surgery when symptomatic.

The correct answer is A.

Which of the following statements is true regarding benign coronary anomalies?

A. Separate ostia of the left anterior descending and left circumflex arteries (absence of a left main coronary) are the least common.

B. Many fistulas demonstrate high flow with significant left-to-right shunts.

C. A long left main coronary artery is an imaging hallmark of an anomalous circumflex coming off the right coronary artery.

D. The right coronary artery coming off the left sinus of Valsalva is the most common.

E. A ...

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