The vessel may be any vein or artery, such as in a deep vein thrombosis (venous) or a coronary artery (arterial). Any clot that forms in a blood vessel is called a “thrombus.”
Once formed, a venous thrombus can slow or block normal blood flow, and even break loose and travel round the body through the vessels. A clot that travels to the circulation is called an embolism. Thrombosis is the often preventable underlying pathology of heart attack, thromboembolic stroke, and venous thromboembolism (VTE), the top three cardiovascular killers.
Thrombosis is normally categorized by where it occurs in the body.
The two types of thrombosis are venous and arterial, depending on whether the clot develops in the vein or an artery. Both are influenced by acquired or inherited risk factors, although the risk factors are different for each.