Arterial thrombosis vs Venous thrombosis
How to tell Arterial thrombosis and Venous thrombosis apart when a board question makes them look alike.
Arterial thrombi are platelet-rich high-flow plaque clots; venous thrombi are red-cell/fibrin-rich stasis clots.
Side by side
Arterial thrombosis is platelet-rich white clot in high-flow arteries, often over atherosclerotic plaque, causing MI, stroke, or limb ischemia.
Venous thrombosis is fibrin/red-cell-rich red clot in low-flow veins, often from stasis, hypercoagulability, or endothelial injury, causing DVT/PE risk.
High shear arterial injury promotes platelet adhesion, activation, and aggregation.
Low-flow venous stasis promotes coagulation cascade activation and red-cell entrapment.
Ruptured plaque, platelet-rich clot, and antiplatelet prevention logic support arterial thrombosis.
Calf swelling, immobility, factor V Leiden, malignancy, and anticoagulation logic support venous thrombosis.
The trap
Both are clots, but vessel type, flow, composition, and treatment logic separate them.
The repair move
For thrombosis, pair vessel flow with clot composition and clinical consequence.
Try a free question
CoreA 58-year-old man with HTN, hyperlipidemia, and a 30-pack-year smoking history has sudden onset crushing chest pain. ECG shows ST elevation in V1-V4. Cardiac cath reveals 99% stenosis of the proximal LAD with platelet-rich thrombus overlying a ruptured atherosclerotic plaque. Which type of thrombus is this?
Show answer and explanation
Answer: A. Arterial (platelet-rich, 'white') thrombus. Arterial thrombi are PLATELET-RICH white clots forming over ruptured atherosclerotic plaques in high-flow vessels; treatment includes antiplatelet agents (aspirin, P2Y12 inhibitors) and PCI/lytics; classic settings are STEMI and ischemic stroke from plaque rupture.
Why the other choices are tempting
- B. Venous thrombi are fibrin and red cell rich, forming in low-flow stasis areas; treatment is anticoagulation.
- C. Mixed thrombi have features of both.
- D. Septic thrombi contain organisms (e.g., endocarditis).
- E. Mural thrombi form on chamber walls or aortic aneurysm walls.
Flashcards
Tap a card to flip it.
What composition supports arterial thrombus?
Platelet-rich white clot supports arterial thrombus.
What risk supports venous thrombosis?
Stasis or hypercoagulability supports venous thrombosis.
Quick answers
What is the fastest way to tell Arterial thrombosis from Venous thrombosis?
Arterial thrombi are platelet-rich high-flow plaque clots; venous thrombi are red-cell/fibrin-rich stasis clots.
What is the key clue for Arterial thrombosis?
Arterial thrombosis is platelet-rich white clot in high-flow arteries, often over atherosclerotic plaque, causing MI, stroke, or limb ischemia.
What is the key clue for Venous thrombosis?
Venous thrombosis is fibrin/red-cell-rich red clot in low-flow veins, often from stasis, hypercoagulability, or endothelial injury, causing DVT/PE risk.
What is the common trap with Arterial thrombosis vs Venous thrombosis?
Both are clots, but vessel type, flow, composition, and treatment logic separate them.