a break in a vessel which allows blood to leak out of circulation into an area surrounding the blood vessel

a bulge in some portion of the blood vessel wall, but not all three layers

a contained area of blood accumulation and occurs with rupture of the wall

a form of cardiac rupture contained by a local area of pericardium and organized thrombus

an aneurysm that does not have some or all of the aortic wall layers, often due to some injury to the inner aortic wall

A balloon-like widening of a portion of an artery that is a weak point along the course of the vessel and may lead to rupture. It is caused by an injury to the blood vessel.

A pseudoaneurysm, also known as a false aneurysm, is an outpouching of a blood vessel, involving a defect in the 2 innermost layer (tunica intima and media) with continuity of the outermost layer (adventia). Alternatively, all three layers are damaged and the bleeding is contained by a blood clot or surrounding structures. Given the increase in invasive cardiac procedures, damage to all three layers is the more common source of pseudoaneurysm.