True regarding myocardial O2 demand?
Correct Answer: Directly proportional to duration of systole
Description: Oxygen demand depends on the work being done. The work done is to pump the blood which is in the ventricles (preload) against the resistance in the aorta (afterload).
So, myocardial oxygen demand depends on
Rate - Directly proportional
Contractility - Directly proportional
Intramyocardial tension - Directly proportional
After load - Directly proportional
Preload - Directly proportional
Wall thickness - Inversely proportional
The oxygen demand of myocardium is not having the same change with varying external works.
Category:
Physiology
Get More
Subject Mock Tests
Practice with over 200,000 questions from various medical subjects and improve your knowledge.
Attempt a mock test nowMock Exam
Take an exam with 100 random questions selected from all subjects to test your knowledge.
Coming SoonGet More
Subject Mock Tests
Try practicing mock tests with over 200,000 questions from various medical subjects.
Attempt a mock test now