CNCC(C) Practice Questions - CNCC(C) Certified Nurse In Critical Care (Canada) Exam

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A patient is supported by an intra-aortic balloon pump (IABP) for cardiogenic shock. During your assessment, you note that the timing waveform shows 'late inflation' of the balloon. What is the primary physiological consequence of late inflation?

Premature closure of the aortic valve and increased left ventricular afterload. Decreased coronary artery perfusion and suboptimal diastolic augmentation. Increased risk of aortic dissection due to high pressure during systole. Retrograde blood flow into the left ventricle causing pulmonary edema.

Correct Answer:

Decreased coronary artery perfusion and suboptimal diastolic augmentation.

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