Arteriovenous Fistula. Arteriovenous Fistulas . Fistula, Arteriovenous . Fistulas, Arteriovenous . Aneurysm, Arteriovenous . Arteriovenous Aneurysm . An abnormal direct communication between an artery and a vein without passing through the CAPILLARIES. An A-V fistula usually leads to the formation of a dilated sac-like connection, arteriovenous aneurysm. The locations and size of the shunts determine the degree of effects on the cardiovascular functions such as BLOOD PRESSURE and HEART RATE. . 1.00
Arteriovenous Malformations. Arteriovenous Malformation . Malformation, Arteriovenous . Malformations, Arteriovenous . Abnormal formation of blood vessels that shunt arterial blood directly into veins without passing through the CAPILLARIES. They usually are crooked, dilated, and with thick vessel walls. A common type is the congenital arteriovenous fistula. The lack of blood flow and oxygen in the capillaries can lead to tissue damage in the affected areas. . 0.44
Arteriovenous Anastomosis. Arteriovenous Anastomoses . Anastomose, Arteriovenous . Anastomoses, Arteriovenous . Anastomosis, Arteriovenous . Arteriovenous Anastomose . A vessel that directly interconnects an artery and a vein, and that acts as a shunt to bypass the CAPILLARY BEDS. Not to be confused with SURGICAL ANASTOMOSIS or ARTERIOVENOUS FISTULA. . 0.43
Embolism, Paradoxical. Crossed Embolism . Paradoxical Embolism . Crossed Embolisms . Embolism, Crossed . Embolisms, Crossed . Embolisms, Paradoxical . Paradoxical Embolisms . Blockage of an artery due to passage of a clot (THROMBUS) from a systemic vein to a systemic artery without its passing through the lung which acts as a filter to remove blood clots from entering the arterial circulation. Paradoxical embolism occurs when there is a defect that allows a clot to cross directly from the right to the left side of the heart as in the cases of ATRIAL SEPTAL DEFECTS or open FORAMEN OVALE. Once in the arterial circulation, a clot can travel to the brain, block an artery, and cause a STROKE. . 0.43
Vascular Fistula. Fistula, Vascular . Fistulas, Vascular . Vascular Fistulas . An abnormal passage between two or more BLOOD VESSELS, between ARTERIES; VEINS; or between an artery and a vein. . 0.38
Vein of Galen Malformations. Galen Malformations Veins . Malformations Vein, Galen . Malformations Veins, Galen . Congenital arteriovenous malformation involving the VEIN OF GALEN, a large deep vein at the base of the brain. The rush of arterial blood directly into the vein of Galen, without passing through the CAPILLARIES, can overwhelm the heart and lead to CONGESTIVE HEART FAILURE. . 0.36
Historical Article. Historical Survey . Historical Article [Publication Type] . An article or portion of an article giving an account of past events or circumstances significant in a field of study, a profession, a discovery, an invention, etc. The concept of history is very wide, ranging from the dawn of time to the present. This publication type is often checked in conjunction with BIOGRAPHY. . 0.35
