Vascular Malformations. Malformation, Vascular . Malformations, Vascular . Vascular Malformation . A spectrum of congenital, inherited, or acquired abnormalities in BLOOD VESSELS that can adversely affect the normal blood flow in ARTERIES or VEINS. Most are congenital defects such as abnormal communications between blood vessels (fistula), shunting of arterial blood directly into veins bypassing the CAPILLARIES (arteriovenous malformations), formation of large dilated blood blood-filled vessels (cavernous angioma), and swollen capillaries (capillary telangiectases). In rare cases, vascular malformations can result from trauma or diseases. . 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. . 0.53
Aneurysm, Dissecting. Aortic Dissection . Blood Vessel Dissection . Dissection, Blood Vessel . Aneurysms, Dissecting . Aortic Dissections . Dissecting Aneurysms . Dissection, Aortic . Dissections, Aortic . Dissecting Aneurysm . An aneurysm caused by a tear in the TUNICA INTIMA of a blood vessel leading to interstitial HEMORRHAGE, and splitting (dissecting) of the vessel wall, often involving the AORTA. Dissection between the tunica intima and TUNICA MEDIA causes luminal occlusion. Dissection at the media, or between the media and the outer ADVENTITIA causes aneurismal dilation. . 0.41
