Cardiac Output — Cardiovascular Physiology

Cardiac Output MCQs: practice questions

Sample Cardiac Output multiple-choice questions from Cardiovascular Physiology.

1. Contractility refers to the intrinsic ability of the heart to:

   • A. Generate force at a given preload
   • B. Fill with blood
   • C. Increase venous compliance
   • D. Lower arterial pressure
   • E. Open the mitral valve

2. A positive inotropic agent increases:

   • A. End-systolic volume
   • B. Afterload only
   • C. Venous compliance
   • D. Contractility
   • E. Total peripheral resistance only

3. If EDV is 120 mL and ESV is 50 mL, stroke volume is:

   • A. 70 mL
   • B. 170 mL
   • C. 60 mL
   • D. 50 mL
   • E. 120 mL

4. An increase in blood volume tends to increase:

   • A. Pulmonary vascular resistance only
   • B. Afterload only
   • C. AV nodal delay
   • D. Mean systemic pressure and venous return
   • E. Capillary oncotic pressure

5. If cardiac output is 5 L/min and heart rate is 72/min, stroke volume is approximately:

   • A. 144 mL/beat
   • B. 36 mL/beat
   • C. 69 mL/beat
   • D. 5 mL/beat
   • E. 720 mL/beat

6. Cardiac oxygen consumption increases with:

7. Sympathetic stimulation increases cardiac output by increasing:

8. A positive inotropic drug can increase cardiac output because it:

9. A decrease in contractility shifts the cardiac function curve:

10. If stroke volume increases while arterial compliance remains constant, pulse pressure will:

11. A sudden decrease in venous return will initially:

12. Stroke volume increases when end-diastolic volume increases because of the:

13. Venous return and cardiac output are equal in the:

14. Afterload on the left ventricle is most closely related to:

15. Cardiac oxygen consumption increases when:

16. If EDV is 120 mL and ESV is 50 mL, ejection fraction is approximately:

17. An increase in venous return generally increases cardiac output by:

18. According to the Fick principle, cardiac output equals:

19. Stroke work is approximately equal to:

20. A negative inotropic agent would tend to:

21. Cardiac oxygen consumption increases with increased:

22. The primary determinant of pulse pressure is:

23. An increase in contractility shifts the cardiac function curve:

24. Preload is most closely related to:

25. A patient with HR 70/min and SV 70 mL has a cardiac output of:

26. If heart rate increases from 70 to 100/min while stroke volume remains 70 mL, cardiac output will:

27. Ejection fraction is normally about:

28. A 70-kg person consumes 250 mL O2/min with arterial O2 content 0.20 mL/mL and mixed venous content 0.15 mL/mL. CO is:

29. Cardiac output is calculated as:

30. An increase in afterload tends to: