| HART | Heparin-Aspirin Reinfarction Trial [not to be confused with HAART |
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| HAT | Halsted Aphasia Test; head, arm, trunk; heparin-associated thrombocytopenia; heterophil antibody tit... |
| HATT | heparin-associated thrombocytopenia and thrombosis |
| HBGF | heparin-binding growth factor |
| HC | hair cell; hairy cell; handicapped; head circumference; head compression; health care; healthy contr... |
| heparin lyase | <enzyme> An enzyme of the isomerase class that catalyses the eliminative cleavage of polysaccharides containing 1,4-linked d-glucuronate or l-iduronate residues and 1,4-alpha-linked 2-sulfoamino-2-deoxy-6-sulfo-d-glucose residues to give oligosaccharides with terminal 4-deoxy-alpha-d-gluc-4-enuronosyl groups at their non-reducing ends. Chemical name: heparin lyase Registry number: EC 4.2.2.7 (12 Dec 1998) |
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| heparin unit | The quantity of heparin required to keep 1 ml of cat's blood fluid for 24 hr at 0캜; it is equivalent approximately to 0.002 mg of pure heparin. Synonym: Howell unit. (05 Mar 2000) |