| Anger camera | A scintigraphic imaging system or type of gamma camera; employing a single thin crystal and multiple photodetecting circuits, that views the entire field at once and is most effective in the 100-to 511-keV energy range. (05 Mar 2000) |
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| Anger, Hal | <person> U.S. Electrical engineer, *1920. See: Anger camera. (05 Mar 2000) |
| Anghelescu's sign | <clinical sign> In vertebral tuberculosis, painful or impossible flexion of the spine when the patient attempts to rest weight on the heels and occiput. (05 Mar 2000) |
| Anghelescu, Constantin | <person> Roumanian surgeon, 1869-1948. See: Anghelescu's sign. (05 Mar 2000) |
| angiectasia | Dilation of a lymphatic or blood vessel. Origin: angio-+ G. Ektasis, a stretching (05 Mar 2000) |
| angiectatic | Marked by the presence of dilated blood vessels. Origin: angio-+ G. Ektatos, capable of extension (05 Mar 2000) |
| angiectopia | Abnormal location of a blood vessel. Synonym: angioplany. Origin: angio-+ G. Ektopos, out of place (05 Mar 2000) |
| angienchyma | <botany> Vascular tissue of plants, consisting of spiral vessels, dotted, barred, and pitted ducts, and laticiferous vessels. Origin: Gr. Receptacle + . Formed like Parenchyma. Source: Websters Dictionary (01 Mar 1998) |
| angiitis | <cardiology> Inflammation of a vessel, chiefly of a blood or a lymph vessel. Synonym: vasculitis. (04 May 1997) |
| angiitis livedo reticularis | A persistent purplish network-patterned discoloration of the skin caused by dilation of capillaries and venules due to stasis or changes in underlying blood vessels including hyalinization; rarely appears as a developmental defect. Synonym: angiitis livedo reticularis, dermatopathia pigmentosa reticularis, livedo racemosa. (05 Mar 2000) |
| angina | Chest pain that occurs secondary to the inadequate delivery of oxygen to the heart muscle. Often described as a heavy or squeesing pain in the midsternal area of the chest. (27 Sep 1997) |
| angina cruris | Intermittent claudication of the leg. (05 Mar 2000) |
| angina decubitus | Angina pectoris related to horizontal, usually supine, body position. (05 Mar 2000) |
| angina diphtheritica | An obsolete term for diphtheria involving the pharynx or larynx. (05 Mar 2000) |
| angina inversa | A form of angina pectoris, characterised by pain that is not precipitated by cardiac work, is of longer duration, is usually more severe, and is associated with unusual electrocardiographic manifestations including elevated ST segments in leads that are ordinarily depressed in typical angina, and usually without reciprocal ST changes; occurring at night in bed. Synonym: angina inversa, variant angina pectoris. (05 Mar 2000) |