67 year old woman with history of deep vein thrombosis. She was admitted for sudden onset of breathlessness and acute right heart failure (cor pulmonale) after a long plane trip. She collapsed and died.
A long detached tubular thrombus, corresponding to the size and configuration of a leg vein, is lodged across the bifurcation of the pulmonary trunk completely occluding the lumen (Pulmonary embolism). Due to its shape, this is known as a “saddle embolus”.