| ECG | Electro-Cardio-Graphy(-Gram); ½ÉÀüµµ = EKG 1. Conducting System Structu... |
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| ARC | accelerating rate calorimetry; acquired immunodeficiency syndrome-related complex; active renin conc... |
| APSAC | 1) Acylating the Plasminogen Streptokinase Activated Complex 2) Anisoylat... |
| APSAC | acylated plasminogen-streptokinase activator complex; anisoylated plasminogen streptokinase activato... |
| MAC | MacConkey [broth]; major ambulatory category; malignancy-associated changes; maximum allowable conce... |
| ALCA-PA | Anomalous origin of the left coronary artery from the pulmonary artery |
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| ARC | Anomalous retinal correspondence |
| MAD | Multi-wavelength anomalous diffraction |
| PAPVC | Partial anomalous pulmonary venous connection |
| TAPVC | Total Anomalous Pulmonary Venous Connection |
| anomalous complex | A complex in the electrocardiogram differing significantly from the physiologic type in the same lead. (05 Mar 2000) |
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| anomalous | Deviating from a general rule, method, or analogy; abnormal; irregular; as, an anomalous proceeding. Origin: L. Anomalus, Gr. Uneven, irregular; priv. + even, same. See Same, and cf. Abnormal. Source: Websters Dictionary (01 Mar 1998) |
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| anomalous atrioventricular excitation | Ectopic atrial beat conducted to the ventricle. (05 Mar 2000) |
| anomalous conduction | Conduction of cardiac electrical impulses through any abnormal pathway. (05 Mar 2000) |
| anomalous correspondence | Abnormal correspondence, a condition, frequent in strabismus, in which corresponding retinal points do not have the same visual direction; the fovea of one eye corresponds to an extrafoveal area of the fellow eye. Synonym: abnormal correspondence. (05 Mar 2000) |
| anomalous diffusion | <radiobiology> Diffusion in most plasma devices, particularly tokamaks, is higher than what one would predict from understood causes. The observed, typical diffusion is referred to as anomalous because it has not yet been explained. Anomalous diffusion includes all diffusion which is not due to collisions and geometric effects. While such effects were not understood when the term was coined, and most still are not, diffusion due to well-understood wave phenomena is still 'anomalous'. Classical diffusion and Neo-classical diffusion are the two well-understood diffusion theories, although neither is adequate to fully explain the observed anomalous diffusion. See: entries for classical diffusion and neoclassical diffusion. Anomalous resistivity (09 Oct 1997) |
| anomalous mitral arcade | Short chordae tendineae extending from both papillary muscles to the central portion of the anterior leaflet of the mitral valve and resulting in stenosis or incompetence of the valve. (05 Mar 2000) |
| anomalous trichromatism | A defect in colour perception in which there appears to be an abnormality or deficiency in one of the three primary pigments of the retinal cones. See: protanomaly, deuteranomaly, tritanomaly. (05 Mar 2000) |
| anomalous uterus | A malformed uterus caused by abnormal development or fusion of the paramesonephric ducts. (05 Mar 2000) |
| anomalous viscosity | The viscous behaviour of nonhomogenous fluids or suspensions, e.g., blood, in which the apparent viscosity increases as flow or shear rate decreases toward zero. (05 Mar 2000) |
| total anomalous pulmonary venous return | <radiology> (TAPVR) admixture lesion: cyanosis, increased pulmonary blood flow, must have L to R shunt for survival (e.g., atrial septal defect) associated with, atrial septal defect, asplenia (12 Dec 1998) |
| total or partial anomalous pulmonary venous connections | Connections in which some or all of the pulmonary veins connect to the right atrium or one of its tributaries. (05 Mar 2000) |
| aberrant complex | An anomalous electrocardiographic complex, more specifically an abnormal ventricular complex caused by abnormal intraventricular conduction of a supraventricular impulse. (05 Mar 2000) |
| activated complex | <chemistry> State of highest energy during a reaction. When reactants form the activated complex, bond breaking and bond formation is occurring. Synonym: transition state. (09 Jan 1998) |
| AIDS dementia complex | <immunology> A frequent cerebral condition in people with AIDS that results in the loss of cognitive capacity, affecting the ability to function in a social or occupational setting. Its cause has not been determined exactly, but may result from HIV infection of cells in the brain or an inflammatory reaction to such infection. (09 Oct 1997) |
| aids-related complex | A prodromal phase of infection with the human immunodeficiency virus (HIV). Laboratory criteria separating aids-related complex (arc) from aids include elevated or hyperactive B-cell humoral immune responses, compared to depressed or normal antibody reactivity in aids; follicular or mixed hyperplasia in arc lymph nodes, leading to lymphocyte degeneration and depletion more typical of aids; evolving succession of histopathological lesions such as localization of kaposi's sarcoma, signaling the transition to the full-blown aids. (12 Dec 1998) |
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