QuestionSBA
QuestionChoice
This artery supplies the posterior parts of the right and left ventricles, as well as the posterior interventricular septum.
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b
Posterior interventricular artery
QuestionChoice
This artery supplies the right ventricle and the apex of the heart.
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c
Right marginal artery
QuestionChoice
This artery supplies the left atrium and ventricle.
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e
Left circumflex artery
QuestionChoice
This artery supplies the anterior parts of the right and left ventricles, as well as the anterior interventricular septum.
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d
Left anterior descending artery
QuestionChoice
The right coronary artery supplies the right atrium and SA node. It arises from the right aortic sinus within the aorta.
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a
Right coronary artery
Concept
Chapter
2693
3792
Coronary blood flow
Topic
159
Cardiovascular physiology
17123
A 55-year-old male comes into the ED via ambulance after experiencing palpitations. His ECG shows an ST elevation myocardial infarction. Treatment is commenced and he is admitted to the hospital. The doctors want to know the underlying cause of this presentation so arrange for the cardiology team to investigate. They find that the patient has a reduced blood supply to the sino-atrial (SA) node upon completion of an angiogram.

What is the blood supply to the SA node?
a