Commonest cause of pulmonary embolism is –
Correct Answer: Thrombosis of leg veins
Description: Ans. is 'a' i.e., Thrombosis of leg veins Thrombi in deep vein of the leg accounts for more than 95% of cases of pulmonary embolism. The most common source of emboli are DVT of femoro-popliteal and iliac veins. But remember that : - Most common site of DVT is calf veins (Calf veins thrombosis are itself associated with a low risk for embolism, but when the thrombosis progresses proximally to involve the larger veins above knee, then the risk becomes very high.
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