CIR CIR Hemodynamic Monitoring & Cardiac Catheterization

Question 1

What is the normal range for pulmonary capillary wedge pressure (PCWP) in a healthy adult?

Accepted Answer

2–12 mmHg

Answer

Normal PCWP is 2–12 mmHg and reflects left atrial filling pressure.

Question 2

During right heart catheterization, which chamber is entered immediately after passing through the tricuspid valve?

Accepted Answer

Right ventricle

Answer

The tricuspid valve separates the right atrium from the right ventricle, so passage through it leads into the right ventricle.

Question 3

Which hemodynamic parameter is calculated as mean arterial pressure minus right atrial pressure divided by cardiac output?

Accepted Answer

Systemic vascular resistance

Answer

Systemic vascular resistance (SVR) = (MAP − RAP) / CO × 80, reflecting afterload on the left ventricle.

Question 4

A cardiac output of 4.0 L/min with a BSA of 2.0 m² yields a cardiac index of:

Accepted Answer

2.0 L/min/m²

Answer

Cardiac index = CO / BSA = 4.0 / 2.0 = 2.0 L/min/m², which is at the lower limit of normal.

Question 5

The Fick principle for calculating cardiac output requires measurement of:

Accepted Answer

Oxygen consumption and arteriovenous oxygen difference

Answer

The Fick method calculates CO = VO₂ / (CaO₂ − CvO₂), requiring oxygen consumption and A-V O₂ content difference.

CIR - Cardiac Interventional Radiology Practice Test