Blood type A, B... Higher risk of blood clots than type O

 People with blood types A and B were found to have a greater risk of developing blood clots than those with type O.

A thrombus is a small clot of blood that has solidified in the blood vessels. A disease caused by such blood clots is thrombosis. Thrombosis is also called thromboembolism, and in particular, refers to a disease caused by blockage of a blood vessel by a thrombus.

A wide variety of symptoms may occur depending on the location of the organ where the thrombosis occurs and the type of blood vessel that occurs. Diseases that can result from thrombosis include acute myocardial infarction, stroke, pulmonary thrombosis, deep vein thrombosis, portal vein thrombosis, acute renal vein occlusion, and central retinal vein occlusion.

Previous studies that showed a correlation between the ABO blood group gene and heart disease showed that blood types A, B, and AB were related, but not type O.

Researchers at the University of Groningen in the Netherlands conducted the study on 400,000 people. When the research team compared and analyzed people with blood types A and B and people with type O, the risk of heart attack was 8% higher for type A and B and 10% higher for heart failure.

In particular, there was a significant difference in the risk of developing blood clots in the veins. Compared to type O, type A and B had a 51% higher risk of deep vein thrombosis and a 47% higher risk of pulmonary embolism. On the other hand, types A and B had a 3% lower risk of hypertension than type O.

Deep vein thrombosis is a disease caused by blood clots in the veins of the lower extremities (legs). When venous blood in the lower extremities stagnate and a blood clot forms in the deep veins, it is called deep vein thrombosis. Pulmonary embolism refers to a condition in which a blood clot in a deep vein moves and blocks a pulmonary blood vessel.