GAVE is characterized by dilated capillaries in the lamina propria with fibrin thrombi. Arterial occlusion may be due to thrombi, amniotic fragments or air embolism. An antithrombotic agent is a drug that reduces the formation of blood clots (thrombi). The arterioles are thickened and occlusion by thrombi are occasionally present. It usually involves removal of thrombi (blood clots), and is then referred to as thrombectomy. The deep veins of the calf are the most common sites of actual thrombi. Embolizations (dislodgement of thrombi) normally go to the lung and cause pulmonary emboli. As a whole, platelets constitute less of venous thrombi when compared to arterial ones. A D-dimer (product of thrombi degradation) test can be specified separately. After the departure of Rebeca, Judith will not stop giving emotional thrombi. As a result, thrombi formation is more prevalent there. In large vessels, the most common causes of thrombi are atherosclerosis and vasoconstriction. However, local thrombi from atherosclerotic plaque are harder to treat than embolized ones. Microemboli usually form as thrombi, and can block arteries outright. Thrombi form more frequently in arteries than veins.