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Difficulty: MediumCardiothoracic and Vascular Surgery

Below are four distinct clinical scenarios involving peripheral vascular compromise. Pair each patient presentation with its most characteristic diagnostic finding.

  • 62-year-old man with calf pain after walking two blocks that is consistently relieved by rest; dorsal pedal pulses are nonpalpable.Resting ankle-brachial index (ABI) of 0.65
  • 74-year-old woman with a long history of poorly controlled diabetes and end-stage renal disease presenting with dry gangrene of the right great toe; popliteal and pedal pulses are bounding.Resting ankle-brachial index (ABI) of 1.45, necessitating a toe-brachial index
  • 48-year-old woman with a history of paroxysmal atrial fibrillation who presents with sudden onset of a cold, pale, and intensely painful left leg.Angiography revealing an abrupt arterial occlusion with absent or minimal collateral vessel formation
  • 30-year-old man who smokes two packs of cigarettes daily presenting with severe ischemic rest pain and ulcerations on the tips of multiple toes; proximal pulses are normal.Angiography demonstrating segmental occlusions of small distal vessels with characteristic 'corkscrew' collaterals

Answer

The claudication patient matches an ABI of 0.65. The diabetic patient with gangrene matches an ABI of 1.45. The atrial fibrillation patient matches an abrupt arterial occlusion. The young smoker matches 'corkscrew' collaterals.
Each clinical vignette highlights classic risk factors and symptoms for a distinct vascular pathology. Typical intermittent claudication correlates with a reduced ABI (0.41-0.90). Patients with diabetes and chronic kidney disease frequently develop calcified vessels, causing falsely elevated ABIs (>1.30) that necessitate toe-brachial index testing. Embolic acute limb ischemia presents abruptly without prior collateral formation. Finally, Buerger disease predominantly affects young male smokers, causing distal ischemia characterized by corkscrew collaterals on imaging.

Step-by-Step Solution

1
Analyze the first patient's presentation (62-year-old with predictable exertional calf pain).
Identified as chronic peripheral artery disease (PAD) with intermittent claudication.
Determines that the expected diagnostic finding is a mild-to-moderate reduction in ABI (0.41 to 0.90).
2
Analyze the second patient's presentation (diabetic/renal disease with gangrene and bounding pulses).
Identified as severe PAD masked by medial arterial calcification.
Explains why the ABI is falsely elevated (>1.30) due to non-compressible vessels, requiring a toe-brachial index for accurate assessment.
3
Analyze the third patient's presentation (atrial fibrillation with sudden cold, painful leg).
Identified as acute limb ischemia secondary to an arterial embolus.
Differentiates acute from chronic ischemia; acute embolic events show an abrupt angiographic cutoff without pre-existing collateral vessels.
4
Analyze the fourth patient's presentation (young smoker with distal toe ulcerations).
Identified as thromboangiitis obliterans (Buerger disease).
Matches the classic demographic with its pathognomonic angiographic finding of small vessel occlusion and corkscrew collaterals.

Key Concept

Differentiating vascular pathologies (chronic PAD, medial arterial calcification, acute embolic ischemia, and Buerger disease) based on clinical risk factors and specific diagnostic vascular findings.
Estimated Time:2m 0s
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Topics

Cardiothoracic and Vascular Surgery

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