As the cardiac muscle contracts, the pressure generated within the wall acts to occlude the coronary vessels running through it carrying its own blood supply. This effect is greatest in the LV where the pressure is highest.

Question 1: In which phase of the cardiac cycle does most of the coronary blood flow to the LV occur?

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As the cardiac muscle contracts, the pressure generated within the wall acts to occlude the coronary vessels running through it carrying its own blood supply. This effect is greatest in the LV where the pressure is highest.

Question 1: In which phase of the cardiac cycle does most of the coronary blood flow to the LV occur?

Answer: Diastole, when the LV is relaxed.

Question 2: What change lowers the proportion of time spent in diastole, thus reducing the time for LV perfusion?

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As the cardiac muscle contracts, the pressure generated within the wall acts to occlude the coronary vessels running through it carrying its own blood supply. This effect is greatest in the LV where the pressure is highest.

Question 1: In which phase of the cardiac cycle does most of the coronary blood flow to the LV occur?

Answer: Diastole, when the LV is relaxed.

Question 2: What change lowers the proportion of time spent in diastole, thus reducing the time for LV perfusion?

Answer: An increase in heart rate.

Question 3: How does the anatomy of the coronary arteries help maintain perfusion?

Click here for answer.

As the cardiac muscle contracts, the pressure generated within the wall acts to occlude the coronary vessels running through it carrying its own blood supply. This effect is greatest in the LV where the pressure is highest.

Question 1: In which phase of the cardiac cycle does most of the coronary blood flow to the LV occur?

Answer: Diastole, when the LV is relaxed.

Question 2: What change lowers the proportion of time spent in diastole, thus reducing the time for LV perfusion?

Answer: An increase in heart rate.

Question 3: How does the anatomy of the coronary arteries help maintain perfusion?

Answer: They run on the outside of the heart initially, and are not compressed by LV contraction during this part of their course.