The antianginal effect of b-blockers may be attributed to which one of the following
Correct Answer: Increase in diastolic perfusion time
Description: The beneficial effects of b-blocking agents are related to their hemodynamic effects--decreased hea rate, blood pressure, and contractility--which decrease myocardial oxygen requirements at rest and during exercise. Lower hea rate is also associated with an increase in diastolic perfusion time that may increase coronary perfusion. Undesirable effects of b-blocking agents in angina include an increase in end-diastolic volume and an increase in ejection time, both of which tend to increase myocardial oxygen requirement. Ref: Katzung 13e pg:203
Category:
Pharmacology
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