Home
Ebooks
Questions
Search

A 71-year-old man returns from the operating room (OR) after undergoing a triple coronary bypass. His initial cardiac index is 2.8 L/ (min*m2 ). Hea rate is then noted to be 55 beats per minute, BP is 110/80 mm Hg, wedge pressure is 15, and his cardiac index has dropped to 1.6 L/(min*m2 ). He has a normal left ventricle. Which of the following maneuvers will increase his cardiac output?

Question Category:
Correct Answer:
Increase his hea rate to 90 by electrical pacing.
Description:
The cardiac index is computed by dividing the cardiac output by the body surface area; the cardiac output is the product of the stroke volume and the hea rate ; therefore, . An increased hea rate will directly increase the cardiac output and cardiac index. The remaining choices will either decrease or not affect the stroke volume and consequently will not increase the cardiac index.
Get More
Subject Mock Tests

Try practicing mock tests with over 200,000 questions from various medical subjects.

Attempt a mock test now
Mock Exam

Attempt an exam of 100 questions randomly chosen from all subjects.

Coming Soon

© 2024 MedicalMCQ. All rights reserved.