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Blood and Nerve Supply to the Heart

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Questions and Answers

What would most likely occur if the blocked artery in the coronary circulation is not restored?

The myocardium supplied by the blocked artery would die (correct)
The coronary sinus would drain into the left atrium
The patient would experience temporary chest pain
The patient would experience increased blood pressure

What is the primary reason for performing a coronary artery bypass grafting?

To reduce blood pressure
To relieve angina that is not amenable to pharmacological control (correct)
To treat aortic stenosis
To widen the coronary sinus

Which branch of the right coronary artery supplies the S-A node?

Anterior interventricular branch
Posterior interventricular branch
Left coronary artery
Nodal branch (correct)

What is the origin of the left coronary artery?

Aortic sinus immediately above the left posterior cusp of the aortic valve (D) Signup and view all the answers

Where does the coronary sinus drain into?

Right atrium to the left of and superior to the opening of the inferior vena cava (D) Signup and view all the answers

Which vein drains directly into the right atrium crossing the atrioventricular groove?

The anterior cardiac veins (C) Signup and view all the answers

Where is the sino-atrial (SA) node located?

Near the top of the crista terminalis, below the superior vena caval opening (B) Signup and view all the answers

Which artery does the middle cardiac vein follow?

The posterior interventricular artery (C) Signup and view all the answers

What effect does the parasympathetic nerve supply have on the heart?

Bradycardic (B) Signup and view all the answers

Where do the Purkinje fibers lie within the heart?

Within the subendocardium of the ventricles (C) Signup and view all the answers