ARRT VASCULAR INTERVENTIONAL MOCK
EXAM 2025 to 2026 COMPREHENSIVE
REVIEW PRACTICE QUESTIONS CLINICAL
CONCEPTS and DETAILED RATIONALES
ARRT VI Mock Exam
1. Which of the following contrast media characteristics is most
directly responsible for patient discomfort and heat sensation
during injection?
A. Viscosity
B. Osmolality
C. Iodine concentration
D. Clearance rate
Rationale: Osmolality refers to the number of particles in a solution per
kilogram of water. High-osmolality contrast media (HOCM) cause a
significant fluid shift from surrounding tissues into the vascular space,
leading to vasodilation, endothelial damage, and the classic sensation of
intense heat and pain.
2. What is the standard maximum dose of contrast media for an
adult patient with normal renal function within a 24-hour
period?
A. 100 mL
B. 250 mL
C. 300 mL
D. 500 mL
Rationale: While individualized based on the patient's weight and renal
health, the generally accepted maximum threshold of standard diagnostic
iodine contrast to prevent Contrast-Induced Nephropathy (CIN) in a
normal adult is 300 mL within 24 hours.
3. A patient develops severe bronchospasm following a contrast
injection. What is the primary first-line medication and dose
administered?
A. Diphenhydramine 50 mg IV
B. Atropine 0.5 mg IV
,C. Epinephrine 0.3 mg IM
D. Hydrocortisone 100 mg IV
Rationale: Epinephrine (1:1000 dilution) at a dose of 0.3 mg given
intramuscularly (IM) is the primary drug of choice for severe, life-
threatening bronchospasm or anaphylaxis. Antihistamines and
corticosteroids act too slowly.
4. Which lab value is considered the most accurate pre-
procedural indicator of overall renal function?
A. Blood Urea Nitrogen (BUN)
B. Serum Creatinine
C. Glated Glomerular Filtration Rate (eGFR)
D. Prothrombin Time (PT)
Rationale: eGFR is calculated using serum creatinine, age, sex, and
race, making it a much more sensitive and reliable measure of true renal
clearance and staging of chronic kidney disease than isolated creatinine
or BUN numbers.
5. According to SIR guidelines, what is the maximum acceptable
International Normalized Ratio (INR) value for a routine, low-
risk vascular interventional procedure?
A. 1.5
B. 1.8
C. 2.0
D. 2.5
Rationale: For the majority of standard vascular access and
interventional procedures, an INR of 1.5 or lower is required to mitigate
the risk of uncontrollable or clinically significant access-site bleeding.
6. Which French size corresponds to an internal diameter of
exactly 2.0 mm?
A. 4 French
B. 6 French
C. 8 French
D. 9 French
Rationale: One French unit equals 1/3 of a millimeter (0.333 mm).
Therefore, a 6 French device features an outer/internal catheter wall
diameter system where 6 divided by 3 equals exactly 2.0 mm.
,7. If a catheter has an external designation of 5 French, what is
its outside diameter in millimeters?
A. 1.35 mm
B. 1.67 mm
C. 2.10 mm
D. 2.50 mm
Rationale: Since 1 French = 0.333 mm, multiplying 5 by 0.333 mm
yields approximately 1.67 mm for its external physical diameter.
8. What is the primary function of a hydrophilic coating on a
guidewire?
A. To increase torque control
B. To reduce friction within the vessel
C. To maximize radiopacity under fluoroscopy
D. To prevent the wire from kinking
Rationale: Hydrophilic wires attract moisture, forming a slick, low-
friction surface layer that allows the wire to glide smoothly through
tortuous anatomy, tight stenoses, and small microcatheter lumens.
9. Which wire component is responsible for providing structural
support and pushability?
A. The safety ribbon
B. The hydrophilic jacket
C. The core mandrel
D. The platinum coil tip
Rationale: The inner core mandrel (usually made of stainless steel or
nitinol) gives the wire its column strength, pushability, and torque
transmission from the operator's hand to the tip.
10. A "J-tip" guidewire is specifically designed to accomplish
which safety goal?
A. Pierce through dense chronic total occlusions
B. Avoid dissecting or perforating healthy vessel walls
C. Maintain stable placement inside a small collateral artery
D. Provide maximum stiffness during stent deployment
Rationale: The rounded shape of a J-tip spreads force across a broader
surface area, allowing the wire to bounce off vessel walls rather than
digging into the intima and causing a dissection.
, 11. Which catheter configuration features a single side hole and a
curved tip designed primarily for selective visceral tracking?
A. Pigtail
B. Straight multi-sidehole
C. Cobra (C2)
D. Omni Flush
Rationale: Selective catheters like the Cobra (C2) or Bernstein have
single end-holes (or rare single sideholes close to the tip) shaped to anchor
cleanly into the ostium of visceral vessels like the celiac or renal arteries.
12. What mechanism prevents a vascular sheath from slipping
backward out of the vessel during tool exchanges?
A. An integrated suture eyelet or hub lock
B. The presence of a side-arm flush port
C. A hydrophilic outer jacket
D. A dilator taper lock
Rationale: Sheath hubs are equipped with suture eyelets or secure skins
locks to allow the operator to secure it to the patient's skin, preventing
accidental migration during high-friction tool transitions.
13. Which access site provides the safest, most direct anatomic
trajectory for an antegrade lower extremity intervention?
A. Contralateral Common Femoral Artery
B. Ipsilateral Common Femoral Artery
C. Right Brachial Artery
D. Radial Artery
Rationale: An antegrade stick (pointing down toward the feet) on the
ipsilateral (same side) common femoral artery provides a direct path
down the leg without needing to cross the aortic bifurcation.
14. During a transradial approach, which medication cocktail is
standardly administered to prevent arterial spasm?
A. Heparin and Protamine
B. Verapamil and Nitroglycerin
C. Lidocaine and Epinephrine
D. Fentanyl and Midazolam
Rationale: Radial artery spasm is a frequent complication.
Interventionalists use a cocktail of vasodilators—typically calcium
EXAM 2025 to 2026 COMPREHENSIVE
REVIEW PRACTICE QUESTIONS CLINICAL
CONCEPTS and DETAILED RATIONALES
ARRT VI Mock Exam
1. Which of the following contrast media characteristics is most
directly responsible for patient discomfort and heat sensation
during injection?
A. Viscosity
B. Osmolality
C. Iodine concentration
D. Clearance rate
Rationale: Osmolality refers to the number of particles in a solution per
kilogram of water. High-osmolality contrast media (HOCM) cause a
significant fluid shift from surrounding tissues into the vascular space,
leading to vasodilation, endothelial damage, and the classic sensation of
intense heat and pain.
2. What is the standard maximum dose of contrast media for an
adult patient with normal renal function within a 24-hour
period?
A. 100 mL
B. 250 mL
C. 300 mL
D. 500 mL
Rationale: While individualized based on the patient's weight and renal
health, the generally accepted maximum threshold of standard diagnostic
iodine contrast to prevent Contrast-Induced Nephropathy (CIN) in a
normal adult is 300 mL within 24 hours.
3. A patient develops severe bronchospasm following a contrast
injection. What is the primary first-line medication and dose
administered?
A. Diphenhydramine 50 mg IV
B. Atropine 0.5 mg IV
,C. Epinephrine 0.3 mg IM
D. Hydrocortisone 100 mg IV
Rationale: Epinephrine (1:1000 dilution) at a dose of 0.3 mg given
intramuscularly (IM) is the primary drug of choice for severe, life-
threatening bronchospasm or anaphylaxis. Antihistamines and
corticosteroids act too slowly.
4. Which lab value is considered the most accurate pre-
procedural indicator of overall renal function?
A. Blood Urea Nitrogen (BUN)
B. Serum Creatinine
C. Glated Glomerular Filtration Rate (eGFR)
D. Prothrombin Time (PT)
Rationale: eGFR is calculated using serum creatinine, age, sex, and
race, making it a much more sensitive and reliable measure of true renal
clearance and staging of chronic kidney disease than isolated creatinine
or BUN numbers.
5. According to SIR guidelines, what is the maximum acceptable
International Normalized Ratio (INR) value for a routine, low-
risk vascular interventional procedure?
A. 1.5
B. 1.8
C. 2.0
D. 2.5
Rationale: For the majority of standard vascular access and
interventional procedures, an INR of 1.5 or lower is required to mitigate
the risk of uncontrollable or clinically significant access-site bleeding.
6. Which French size corresponds to an internal diameter of
exactly 2.0 mm?
A. 4 French
B. 6 French
C. 8 French
D. 9 French
Rationale: One French unit equals 1/3 of a millimeter (0.333 mm).
Therefore, a 6 French device features an outer/internal catheter wall
diameter system where 6 divided by 3 equals exactly 2.0 mm.
,7. If a catheter has an external designation of 5 French, what is
its outside diameter in millimeters?
A. 1.35 mm
B. 1.67 mm
C. 2.10 mm
D. 2.50 mm
Rationale: Since 1 French = 0.333 mm, multiplying 5 by 0.333 mm
yields approximately 1.67 mm for its external physical diameter.
8. What is the primary function of a hydrophilic coating on a
guidewire?
A. To increase torque control
B. To reduce friction within the vessel
C. To maximize radiopacity under fluoroscopy
D. To prevent the wire from kinking
Rationale: Hydrophilic wires attract moisture, forming a slick, low-
friction surface layer that allows the wire to glide smoothly through
tortuous anatomy, tight stenoses, and small microcatheter lumens.
9. Which wire component is responsible for providing structural
support and pushability?
A. The safety ribbon
B. The hydrophilic jacket
C. The core mandrel
D. The platinum coil tip
Rationale: The inner core mandrel (usually made of stainless steel or
nitinol) gives the wire its column strength, pushability, and torque
transmission from the operator's hand to the tip.
10. A "J-tip" guidewire is specifically designed to accomplish
which safety goal?
A. Pierce through dense chronic total occlusions
B. Avoid dissecting or perforating healthy vessel walls
C. Maintain stable placement inside a small collateral artery
D. Provide maximum stiffness during stent deployment
Rationale: The rounded shape of a J-tip spreads force across a broader
surface area, allowing the wire to bounce off vessel walls rather than
digging into the intima and causing a dissection.
, 11. Which catheter configuration features a single side hole and a
curved tip designed primarily for selective visceral tracking?
A. Pigtail
B. Straight multi-sidehole
C. Cobra (C2)
D. Omni Flush
Rationale: Selective catheters like the Cobra (C2) or Bernstein have
single end-holes (or rare single sideholes close to the tip) shaped to anchor
cleanly into the ostium of visceral vessels like the celiac or renal arteries.
12. What mechanism prevents a vascular sheath from slipping
backward out of the vessel during tool exchanges?
A. An integrated suture eyelet or hub lock
B. The presence of a side-arm flush port
C. A hydrophilic outer jacket
D. A dilator taper lock
Rationale: Sheath hubs are equipped with suture eyelets or secure skins
locks to allow the operator to secure it to the patient's skin, preventing
accidental migration during high-friction tool transitions.
13. Which access site provides the safest, most direct anatomic
trajectory for an antegrade lower extremity intervention?
A. Contralateral Common Femoral Artery
B. Ipsilateral Common Femoral Artery
C. Right Brachial Artery
D. Radial Artery
Rationale: An antegrade stick (pointing down toward the feet) on the
ipsilateral (same side) common femoral artery provides a direct path
down the leg without needing to cross the aortic bifurcation.
14. During a transradial approach, which medication cocktail is
standardly administered to prevent arterial spasm?
A. Heparin and Protamine
B. Verapamil and Nitroglycerin
C. Lidocaine and Epinephrine
D. Fentanyl and Midazolam
Rationale: Radial artery spasm is a frequent complication.
Interventionalists use a cocktail of vasodilators—typically calcium
