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1 — The Machinery of Clot Formation

Where a clot comes from

The triad, and the trigger that leads it

Stasis and turbulence: two ways to lose laminar flow

Hypercoagulability: tipping the balance

Interactive: Risk Triangulation

2 — Reading the Clot

White thrombus, red thrombus

Lines of Zahn, and the post-mortem impostor

Interactive: The Specimen Bench

3 — When the Clot Travels

The four fates of a thrombus

FAT BAT: not every embolus is a clot

Two circuits, two catastrophes

Consumed: TTP and DIC

Interactive: The Embolus Router

4 — Check Your Understanding

Two limbs at once

Dating a thrombus

A venous clot in an arterial bed

A reasoning-first pathology course on vascular thromboembolism: why clots form (Virchow's triad), what their morphology and Lines of Zahn reveal about where and when they formed, and where emboli travel — with nine mechanism diagrams, three scored interactive tools and a final check.

Haemostasis is a survival mechanism. Thrombosis is that same mechanism running where it was never needed —
and the difference between the two is not luck, it is a set of conditions you can name, examine and predict.

Vascular Thromboembolism: From Virchow's Triad to the Embolic Catastrophe

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