Which of the following hemodynamic changes is not evident in cardiac tamponade during diastole?
Correct Answer: Biphasic venous return
Description: Ans. is 'c' i.e., Biphasic venous return Hemodynamics of cardiac Tamponade inDiastole* During the diastole the pericardial pressure remains elevated.* It is greater than the intracavitary pressure thus there is no filling during the diastole.* The absence of venous return during the diastole leads to absence of "y" waves on the /. V.P. and the "diastolic collapse" of the right atria and ventricle.Systole* During systole, the decrease in size of the heart due to ventricular contraction reduces the pericardial pressure.* Thus in cardiac tamponade heart filling occurs only in systole.* So, the venous return in cardiac tamponade is unimodal instead of the normal biphasic mode.* The ventricular contraction causes the atria to relax and produce the "x" wave of the J.V.P.
Category:
Medicine
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