Pulmonary embolism is, in the majority of cases, secondary to venous thrombophlebitis, most often the lower limbs (occlusion of a vein by a clot).
Venous insufficiency, prolonged immobilization (bed rest, a leg in the cast ...), surgery can be responsible for phlebitis. it is also known that long trips by plane, but also by train or car, are also responsible for thrombophlebitis because of the sitting position, immobility ... promote the formation of clots.
But there are still other causes or contributing factors to the formation of a clot in a vein:
- a disease of blood clotting,
- medicines (pill), etc.
The clot (or a part of the clot) breaks off and migrates into the bloodstream to get stuck in a pulmonary artery. As a result, the blood in the lungs circulates badly, especially where this obstruction has occurred. Oxygenation of the blood at the pulmonary level is bad, the patient is out of breath. And the blood circulation in the lungs being disturbed, the heart pain and suffers to circulate the blood in the lungs.
Beware of blood circulation disorders!
The disorders of the blood circulation can be related to the heart, the arteries or the veins, which constitutes very different pathologies ... The point on this frequent disorder
NB: the disease can progress to chronic heart and respiratory failure.
Recurrence is possible if the emboligenic focus (thrombophlebitis) is not treated effectively.
To better understand: schematic presentation of the lungs
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