IABP hemodynamic effects

 Q: All of the following are the hemodynamic effects of Intra-Aortic-Balloon Pump (IABP) EXCEPT?

A) decrease in systolic pressure 

B) increase in diastolic pressure 

C) increase in heart rate 

D) decrease in the mean pulmonary capillary wedge pressure 

E) increase in cardiac output

Answer: C

All of the above are the desired effects of IABP except choice C. With improved hemodynamics, heart rate is expected to decrease by 20 percent. 

In the above question, it would be worth mentioning that choice B i.e., increase in diastolic pressure may augment by 30 percent. This desired effect raises coronary blood flow to the myocardial area perfused by a critically ischemic vessel.

#hemodynamics

References:

1. De Silva K, Lumley M, Kailey B, Alastruey J, Guilcher A, Asrress KN, Plein S, Marber M, Redwood S, Perera D. Coronary and microvascular physiology during intra-aortic balloon counterpulsation. JACC Cardiovasc Interv. 2014 Jun;7(6):631-40. doi: 10.1016/j.jcin.2013.11.023. Epub 2014 Apr 9. PMID: 24726295.

2. Takeuchi M, Nohtomi Y, Yoshitani H, Miyazaki C, Sakamoto K, Yoshikawa J. Enhanced coronary flow velocity during intra-aortic balloon pumping assessed by transthoracic Doppler echocardiography. J Am Coll Cardiol. 2004 Feb 4;43(3):368-76. doi: 10.1016/j.jacc.2003.08.047. PMID: 15013116.