![]() ![]() ![]() ![]() Thrombus formation within the atrium occurs mainly in patients with mitral valve disease, and especially in those with mitral valve stenosis (narrowing), with atrial fibrillation (AF). Emboli of cardiac origin are frequently encountered in clinical practice. Īn arterial embolus might originate in the heart (from a thrombus in the left atrium, following atrial fibrillation or be a septic embolus resulting from endocarditis). Īn embolus lodging in the brain from either the heart or a carotid artery will most likely be the cause of a stroke due to ischemia. It is a major cause of infarction (tissue death from blockage of the blood supply). Arterial Īrterial embolism can cause occlusion in any part of the body. However, pulmonary embolism is generally classified as a form of venous embolism, because the embolus forms in veins, e.g. Sometimes, multiple classifications apply for instance a pulmonary embolism is classified as an arterial embolism as well, in the sense that the clot follows the pulmonary artery carrying deoxygenated blood away from the heart. Arterial embolism are those that follow and, if not dissolved on the way, lodge in a more distal part of the systemic circulation. There are different types of embolism, some of which are listed below.Įmbolism can be classified based on where it enters the circulation, either in arteries or in veins. Sometimes it is created intentionally for a therapeutic reason, such as to stop bleeding or to kill a cancerous tumor by stopping its blood supply. An embolism in which the embolus is a piece of thrombus is called a thromboembolism.Īn embolism is usually a pathological event, caused by illness or injury. Such a blockage ( vascular occlusion) may affect a part of the body distant from the origin of the embolus. An embolism can cause partial or total blockage of blood flow in the affected vessel. The embolus may be a blood clot ( thrombus), a fat globule ( fat embolism), a bubble of air or other gas ( gas embolism), amniotic fluid ( amniotic fluid embolism), or foreign material. H&E stain.Īn embolism is the lodging of an embolus, a blockage-causing piece of material, inside a blood vessel. The kidney was surgically removed because of cancer. Micrograph of embolic material in the artery of a kidney. ![]()
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