IABP effects

Q: Which of the following doesn't occur during Inflation and deflation of the intra-aortic balloon pump (IABP)?

A) Blood is displaced to the proximal aorta by inflation during diastole

B) Blood is displaced to the proximal aorta by deflation during diastole

C) Aortic volume is reduced during diastole

D) Vacuum effect is created by rapid balloon deflation during systole

Answer: B

IABP creates two major consequences for hemodynamics:

1. During diastole of the heartbeat cycle, the pump gets inflated and displaces the blood to the proximal aorta (choice A)

2. During the systole phase of the heartbeat cycle, aortic volume is decreased (choice C). This occurs due to an interesting phenomenon of a vacuum effect created by rapid balloon deflation (Choice D).

Choice B is wrong as IABP inflates during diastole (not deflate)

#hemodynamic

Reference:

Gajanan G, Brilakis ES, Siller-Matula JM, Zolty RL, Velagapudi P. The Intra-Aortic Balloon Pump. J Vis Exp. 2021 Feb 5;(168). doi: 10.3791/62132. PMID: 33616109.