RCIS Intra-Aortic Balloon Pump and Mechanical Circulatory Support

Question 1

The intra-aortic balloon pump (IABP) inflates at which point on the arterial waveform?

Accepted Answer

Dicrotic notch

Answer

The IABP inflates at the dicrotic notch, which represents aortic valve closure and the onset of diastole, maximizing diastolic augmentation.

Question 2

Which of the following is an absolute contraindication for IABP insertion?

Accepted Answer

Significant aortic regurgitation

Answer

Significant aortic regurgitation is an absolute contraindication because IABP inflation during diastole worsens regurgitant flow back into the left ventricle.

Question 3

What is the primary hemodynamic benefit of IABP counterpulsation?

Accepted Answer

Increased coronary perfusion pressure

Answer

Diastolic balloon inflation augments diastolic aortic pressure, which directly increases coronary perfusion pressure since coronaries fill during diastole.

Question 4

The optimal tip position of an IABP catheter on chest X-ray is:

Accepted Answer

2 cm distal to the left subclavian artery

Answer

The balloon tip should be positioned 2 cm distal to the left subclavian artery to avoid occluding the subclavian or carotid arteries during inflation.

Question 5

IABP deflation should occur:

Accepted Answer

Just before systole (end diastole)

Answer

Deflation just before systole reduces afterload by creating a pressure void, decreasing left ventricular work during the ejection phase.

RCIS - Registered Cardiovascular Invasive Specialist Practice Test

RCIS - Registered Cardiovascular Invasive Specialist Practice Test

RCIS Intra-Aortic Balloon Pump and Mechanical Circulatory Support