The most common cause of a pulmonary embolism is a blood clot (thrombus) in a large leg vein of the leg that breaks off and travels to the lungs (embolus).An embolus may be from clots in other parts of the body.Or they may be made up of other solids, liquids, or gases that travel to the lungs.he most common cause of a pulmonary embolism is a blood clot (thrombus) in a large leg vein of the leg that breaks off and travels to the lungs (embolus).
Ambrisentan is an endothelin receptor antagonist indicated for pulmonary arterial hypertension in patients with WHO class II or III symptoms. It improves exercise ability and decreases progression of clinical symptoms.
Group 2 pulmonary hypertension. Group 2 pulmonary hypertension is often associated with left heart disease such as mitral valve disease or long-term high blood pressure. Left heart disease is the most common cause of pulmonary hypertension.