Thorax: coronary circulation: practice question

A Anatomy question in the style of the NEET PG paper. Answer it first, then read why the right option is right and why each of the others is wrong.

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Anatomy · Thorax: coronary circulation

Sample item

Which coronary artery most commonly supplies the anterior interventricular septum and anterior wall of the left ventricle?

Original practice item, not a recalled exam question. Nothing here is recorded.

The answer and the reasoning

B. Left anterior descending artery

The left anterior descending artery, also called the anterior interventricular artery, supplies the anterior interventricular septum and much of the anterior left ventricle. Its occlusion can produce a large anterior infarction.

Option by option

  • A. Posterior descending artery only

    Posterior descending supply is posterior septal territory.

  • B. Left anterior descending artery (correct)

    Correct. LAD distribution includes anterior septum and anterior LV.

  • C. Right marginal artery

    Right marginal artery mainly supplies the right ventricular margin.

  • D. Circumflex artery only

    Circumflex supplies lateral and posterior LV regions depending on dominance.

Source note: Original NextPrep sample item — pending expert review. This item is original practice material awaiting independent expert review, so confirm important facts in a standard textbook.

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Questions about this Anatomy question

What is the answer to this Anatomy question?

The best answer is B, Left anterior descending artery. The left anterior descending artery, also called the anterior interventricular artery, supplies the anterior interventricular septum and much of the anterior left ventricle.

Why is "Posterior descending artery only" not the answer?

Posterior descending supply is posterior septal territory.

Why is "Right marginal artery" not the answer?

Right marginal artery mainly supplies the right ventricular margin.

Why is "Circumflex artery only" not the answer?

Circumflex supplies lateral and posterior LV regions depending on dominance.

What concept does this question test?

It tests Thorax: coronary circulation in Anatomy. Its occlusion can produce a large anterior infarction.

How hard is this question?

We tag it as an application question: it asks you to use a fact on a patient or a finding. The tag is our own editorial judgement, not an official difficulty rating, so read the reason for every option, not only the answer.

How should I study Thorax: coronary circulation?

Learn every nerve by its route, its muscles and what a lesion looks like at the bedside. That one habit answers a large share of questions. Then use the flashcards and the other Anatomy questions on this site to test what stuck.

Is this a real NEET PG question?

No. It is an original practice item (editorial status: sample, version 1). NextPrep does not publish recalled or leaked questions, and independent faculty review of this item has not been completed yet, so confirm important facts in a standard textbook.