RVT Vascular Pathology and Aneurysms 4

Question 1

What is the 'to-and-fro' waveform pattern seen on spectral Doppler at the neck of a pseudoaneurysm?

Accepted Answer

Forward flow in systole and retrograde flow in diastole as blood enters and exits the sac

Answer

During systole, blood flows into the pseudoaneurysm sac; during diastole, it flows back out, creating the characteristic to-and-fro pattern at the neck.

Question 2

In Ehlers-Danlos syndrome type IV (vascular type), which vessel is at greatest risk for spontaneous rupture?

Accepted Answer

Medium-sized arteries such as the celiac, mesenteric, and renal arteries

Answer

EDS type IV causes deficient type III collagen, predisposing medium-caliber visceral and renal arteries (and gut) to spontaneous rupture.

Question 3

Which criterion is most commonly used to recommend surgical or endovascular repair of an infrarenal AAA in a male patient?

Accepted Answer

Diameter ≥ 5.5 cm or growth > 10 mm/year

Answer

Standard US guidelines recommend repair for AAAs ≥ 5.5 cm diameter in men or rapid growth > 10 mm per year due to rupture risk.

Question 4

A celiac artery aneurysm is detected on abdominal duplex. Which finding would most urgently prompt referral for intervention?

Accepted Answer

Rapid interval growth of 5 mm over 3 months with symptoms

Answer

Rapid growth and symptoms (pain, tenderness) indicate high rupture risk in visceral aneurysms, warranting urgent intervention.

Question 5

On B-mode ultrasound, intraluminal thrombus within an aortic aneurysm typically appears as:

Accepted Answer

Heterogeneous echogenic material layered along the wall with a patent lumen centrally

Answer

Mural thrombus appears as heterogeneous echogenic material attached to the aneurysm wall, with a residual flow channel visible centrally.

(RVT) Registered Vascular Technologist Practice Test

(RVT) Registered Vascular Technologist Practice Test

RVT Vascular Pathology and Aneurysms 4