Overall action of caffeine on hea rate is ?
Correct Answer: Decreases
Description: Ans. is'b' i.e., Decreases (Ref: KDT Vh/e P. 4881)CaffeineCaffeine out of the three naturally occurring methylxanthines, only caffeine is used as a CNS stimulant.Methylxanthines directly stimulate the hea and increase force of myocardial contractions.They tend to increase hea rate by cardiac action, but decrease it by causing vagal stimulation- net effect is variable.Tachycardia is more common with theophylline, but caffeine generally lowers hea rate.
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