CIR Hemodynamic Monitoring & Cardiac Catheterization Flashcards
6 cards from real CIR practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 CIR Hemodynamic Monitoring & Cardiac Catheterization flashcards as text
Which sheath size in French units is equivalent to an inner diameter of approximately 2.0 mm?
Answer: 6 French
A 6 French sheath has an inner diameter of approximately 2.0 mm; French size refers to outer circumference in mm (OD = Fr/π).
During coronary catheterization, 'damping' of the pressure waveform upon catheter engagement most often suggests:
Answer: Catheter tip occlusion or ostial stenosis
A damped or ventricularized pressure waveform upon coronary engagement indicates the catheter is obstructing flow, often due to ostial disease or deep engagement.
Fractional flow reserve (FFR) of ≤0.80 across a coronary lesion indicates:
Answer: Hemodynamically significant ischemia warranting revascularization
An FFR ≤ 0.80 is the validated threshold indicating that a lesion causes significant ischemia and is likely to benefit from PCI.
Which access site for cardiac catheterization has the lowest rate of major vascular access complications?
Answer: Radial artery
Transradial access is associated with significantly fewer major vascular complications, including bleeding and pseudoaneurysm, compared to transfemoral access.
The Allen test is performed prior to radial artery access to confirm:
Answer: Patent ulnar collateral circulation to the hand
The Allen test assesses patency of the ulnar artery to ensure adequate collateral circulation to the hand if the radial artery is compromised.
Intravascular ultrasound (IVUS) in coronary interventions primarily provides information about:
Answer: Plaque morphology, vessel sizing, and stent apposition
IVUS uses a miniaturized ultrasound transducer on a coronary guidewire to visualize plaque composition, reference vessel diameter, and stent deployment quality.