| arterial transfusion | Direct transfusion from an artery of the donor into an artery of the receptor. (05 Mar 2000) |
|---|---|
| arterial vein | <anatomy, vein> So called because it ramifies like an artery (portal vein) or because, while proceeding from the heart like an artery, it contains unoxygenated blood, like a vein (pulmonary artery). Synonym: vena arteriosa. (05 Mar 2000) |
| arterial wave | A wave in the jugular phlebogram due to transmission of carotid artery pulsation. B wave, the initial positive deflection in the electroretinogram, possibly arising from the inner nuclear layer of the retina. (05 Mar 2000) |
| arterio-arterial fistula | Abnormal communication between two arteries. It may result from injury or occur as a congenital abnormality. (12 Dec 1998) |
| pancreaticoduodenal arterial arcades | Anastomoses between the anterior and posterior pancreaticoduodenal arteries (from the gastroduodenal artery) and the anterior and posterior inferior pancreaticoduodenal arteries (from the superior mesenteric artery) on the anterior and posterior aspects of the head of the pancreas and the duodenum, supplying both structures. (05 Mar 2000) |
| mean arterial pressure | <cardiology, physiology> The average value for arterial pressure. Systolic pressure + diastolic pressure divided by 2. (27 Sep 1997) |
| cephalic arterial rami | Parietal branches of the sympathetic trunks conveying postsynaptic sympathetic fibres from the superior cervical ganglion to the carotid arteries for distribution within the head. (05 Mar 2000) |
| cerebral arterial circle | The roughly pentagonally shaped circle of vessels on the ventral aspect of the brain in the area of the optic chiasm, hypothalamus, and interpeduncular fossa. See: circle of Willis. (05 Mar 2000) |
| greater arterial circle of iris | An arterial circle at the ciliary border of the iris. Synonym: circulus arteriosus iridis major. (05 Mar 2000) |
| plantar arterial arch | The arterial arch formed by the lateral plantar artery running across the bases of the metatarsal bones and anastomosing with the dorsal pedis artery, either of two bony arch's of the foot, longitudinal arch or transverse arch. See: medial longitudinal arch of foot, lateral longitudinal arch of foot, transverse arch of foot. Synonym: arcus plantaris, plantar arterial arch. (05 Mar 2000) |
| posttraumatic arterial thrombosis | Posttraumatic venous thrombosis, intravascular clotting due to injury to a vessel wall. (05 Mar 2000) |
| hyaline degeneration of the elastic tissue of the arterial wall | Seen during involution of the uterus. (05 Mar 2000) |
| superficial palmar (arterial) arch | The arterial arch in the hand located superficial to the long flexor tendons approximately at the level of a line extrapolated across the palm from the distal side of the outstretched thumb. It is formed principally by the termination of the superficial ulnar artery and is usually completed by a communication with the superficial palmar branch of the radial artery. The arch gives rise to the common palmar digital arteries. Synonym: arcus palmaris superficialis, arcus volaris superficialis. (05 Mar 2000) |
| deep palmar (arterial) arch | The arterial arch located deep to the long flexor tendons in the hand. It is formed by the terminal part of the radial artery in conjunction with the deep palmar branch of the ulnar artery. The arch gives rise to palmar metacarpal and princeps pollicis arteries. Synonym: arcus palmaris profundus, arcus volaris profundus. (05 Mar 2000) |
| diffuse arterial ectasia | Spontaneous enlargement with dilation of the vessels in a circumscribed area. (05 Mar 2000) |