What does the LAD branching from the left coronary artery supply?

What does the LAD branching from the left coronary artery supply?

• A. Right atrium
• B. Anterior division of the left bundle branch
• C. Left ventricle only
• D. SA node

Answer: (B)

The left anterior descending (LAD) artery branches off from the left coronary artery and is primarily responsible for supplying blood to the anterior wall of the left ventricle as well as the interventricular septum. One of the critical aspects of its function is providing blood supply to the anterior division of the left bundle branch, which is essential for the conduction system of the heart.

The anterior division of the left bundle branch specifically facilitates the transmission of electrical impulses to the left ventricle, ensuring proper contraction and coordination. The health and patency of the LAD are vital for maintaining efficient cardiac function, particularly in managing the rhythm and output of the left ventricle during systole.

This choice underscores the relationship between the arterial supply and the conduction system, emphasizing how well-perfused myocardial areas are critical for optimal heart function. For a comprehensive understanding of the heart's electrical system, recognizing how the LAD supports the left bundle branch enhances concepts around arrhythmias and cardiac output.