当下肢静脉中的血凝块（来自深静脉血栓形成）脱落并通过身体移动到肺部，在那里沉积和阻塞血流时，就发生血栓栓塞。
Thromboembolism occurs when a blood clot (from a deep vein thrombosis) in a leg vein breaks off and travels through the body to the lungs where it becomes lodged and blocks blood flow.
静脉血栓栓塞的两种最常见表现是深静脉血栓形成和肺栓塞。
The two most common manifestations of VTE are deep vein thrombosis and pulmonary embolism.
测量指标——预期诊断和被证实为有症状的深部静脉血栓形成或者肺栓塞。
Measurement: Prospectively diagnosed and confirmed symptomatic deep venous thrombosis or pulmonary embolism.
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