| Lev's disease | <syndrome> Bundle branch block in a patient with normal myocardium and normal coronary arteries resulting from fibrosis or calcification including the conducting system; affects the membranous septum, the apex of the muscular septum, and often the mitral and aortic valve rings. Synonym: Lev's disease. (05 Mar 2000) |
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| Lev's syndrome | <syndrome> Bundle branch block in a patient with normal myocardium and normal coronary arteries resulting from fibrosis or calcification including the conducting system; affects the membranous septum, the apex of the muscular septum, and often the mitral and aortic valve rings. Synonym: Lev's disease. (05 Mar 2000) |
| Lev, Maurice | <person> U.S. Pathologist, *1908. See: Lev's disease, Lev's syndrome. (05 Mar 2000) |
| Levaditi stain | <technique> A silver nitrate stain for blackening spirochetes in tissue sections. (05 Mar 2000) |
| Levaditi, Constantin | <person> Roumanian bacteriologist in Paris, 1874-1928. See: Levaditi stain. (05 Mar 2000) |
| levallorphan | <chemical> An opioid antagonist with properties similar to those of naloxone; in addition it also possesses some agonist properties. It should be used cautiously; levallorphan reverses severe opioid-induced respiratory depression but may exacerbate respiratory depression such as that induced by alcohol or other non-opioid central depressants. Pharmacological action: narcotic antagonists. Chemical name: Morphinan-3-ol, 17-(2-propenyl)- (12 Dec 1998) |
| levallorphan tartrate | 1-N-Allyl-3-hydroxymorphinan tartrate;the N-allyl analog of levorphanol, antagonistic to the actions of narcotic analgesics; used in the treatment of respiratory depression due to overdosage of narcotics. (05 Mar 2000) |
| levamisole | <chemical> An antihelminthic drug that has been tried experimentally in rheumatic disorders where it apparently restores the immune response by increasing macrophage chemotaxis and t-lymphocyte function. Paradoxically, this immune enhancement appears to be beneficial in rheumatoid arthritis where dermatitis, leukopenia, and thrombocytopenia, and nausea and vomiting have been reported as side effects. Pharmacological action: adjuvants, immunologic, antinematodal agent, antirheumatic agents. Chemical name: Imidazo(2,1-b)thiazole, 2,3,5,6-tetrahydro-6-phenyl-, (S)- (12 Dec 1998) |
| levan | A polysaccharide of fructose (e.g., inulin) containing small amounts of other sugars; present in certain tubers. Synonym: levan, levulan, levulin, levulosan, polyfructose. (05 Mar 2000) |
| levan fructotransferase | <enzyme> Forms difructose 2,6'-6,2' dianhydride Registry number: EC 2.4.1.- (26 Jun 1999) |
| levana | A goddess who protected newborn infants. Origin: L, fr. Levare to raise. Source: Websters Dictionary (01 Mar 1998) |
| levansucrase | <enzyme> An enzyme catalyzing transfer of the fructose moiety of sucrose to polyfructose (a levan), releasing d-glucose. (05 Mar 2000) |
| levarterenol | Synonym: norepinephrine. (05 Mar 2000) |
| levarterenol bitartrate | norepinephrine bitartrate |
| levation | The act of raising; elevation; upward motion, as that produced by the action of a levator muscle. Origin: L. Levatio. Source: Websters Dictionary (01 Mar 1998) |