CCI - Cardiovascular Credentialing International Invasive Catheterization Procedures Questions and Answers

Question 1

A patient in the cardiac cath lab has the following right heart pressures recorded: Right Atrium (RA) mean = 15 mmHg, Right Ventricle (RV) = 45/15 mmHg, Pulmonary Artery (PA) = 45/25 mmHg, and Pulmonary Capillary Wedge Pressure (PCWP) = 22 mmHg. These findings are most indicative of which condition?

Accepted Answer

Left-sided heart failure

Answer

The elevated Pulmonary Capillary Wedge Pressure (PCWP) of 22 mmHg (normal is 6-12 mmHg) is a direct reflection of elevated left atrial pressure. This high pressure on the left side of the heart backs up into the pulmonary circulation, causing secondary pulmonary hypertension (elevated PA pressures) and subsequently elevated right-sided pressures (RV and RA). This pattern is classic for left-sided heart failure. [28, 30]

Question 2

During a right heart catheterization, the equalization of end-diastolic pressures across all four cardiac chambers (e.g., RA, RV, PA diastolic, and PCWP are all within 5 mmHg of each other) is a classic hemodynamic sign of which condition?

Accepted Answer

Constrictive pericarditis

Answer

Constrictive pericarditis is characterized by a rigid, non-compliant pericardium that encases the heart and limits diastolic filling for all chambers equally. This results in the hallmark hemodynamic finding of elevated and equalized end-diastolic pressures. [14, 16] While restrictive cardiomyopathy can have some similar features, the classic and most defining characteristic of equalization points to constriction. [16, 20]

Question 3

A patient undergoes a left heart catheterization via the right femoral artery. Several hours post-procedure, the patient complains of severe low back pain and becomes hypotensive and tachycardic. Which of the following complications should be suspected first?

Accepted Answer

Retroperitoneal bleed

Answer

A puncture of the femoral artery above the inguinal ligament can lead to bleeding that tracks into the retroperitoneal space. This concealed hemorrhage can accommodate a large volume of blood before external signs are visible. The combination of severe back or flank pain with hemodynamic instability (hypotension, tachycardia) is the classic presentation for a retroperitoneal bleed. [7, 8, 18]

Question 4

The Gorlin formula is a standard calculation used in the cardiac catheterization lab to determine which of the following parameters?

Accepted Answer

Aortic valve area

Answer

The Gorlin formula is a well-established hemodynamic calculation used to estimate the area of a stenotic valve, most commonly the aortic or mitral valve. It uses cardiac output, the systolic or diastolic filling period, heart rate, and the mean pressure gradient across the valve to derive the valve area in cm². [1, 4, 10]

Question 5

When engaging the left main coronary artery with a catheter, the pressure waveform abruptly changes, showing a sharp drop in diastolic pressure and a morphology that resembles a left ventricular tracing. This dangerous phenomenon, known as 'ventricularization,' is a critical sign of what?

Accepted Answer

Significant left main coronary artery stenosis

Answer

Ventricularization of the pressure waveform occurs when the tip of the catheter partially or fully occludes a significant stenosis at the ostium of the left main coronary artery. [11, 21, 23] The catheter tip is now recording the post-stenotic pressure, which is low and mimics the LV waveform, while simultaneously causing ischemia by blocking flow. This is a critical warning sign requiring immediate catheter withdrawal. [23, 26]

CCI - Cardiovascular Credentialing International Practice Test

CCI - Cardiovascular Credentialing International Practice Test

CCI - Cardiovascular Credentialing International Invasive Catheterization Procedures Questions and Answers