[ H ]

• H  bacterial antigen in serologic classification of bacteria [Ger. Hauch, breath]; deflection in the His bundle in electrogram [spike]; dose equivalent; draft [Lat. haustus]; electrically induced spinal reflex; enthalpy; fucosal transferase-producing gene; heart; heavy [strand]; height; hemagglutination; hemisphere; hemolysis; Hemophilus; henry; heparin; heroin; high; hippocampus; histidine; Histoplasma; histoplasmosis; Holzknecht unit; homosexual; horizontal; hormone; horse; hospital; Hounsfield unit; hour; human; hydrogen; hydrolysis; hygiene; hyoscine; hypermetropia; hyperopia; hypodermic; hypothalamus; magnetic field strength; magnetization; mustard gas; oersted; the region of a sarcomere containing only myosin filaments [band; Ger. heller, lighter]
• H₀  null hypothesis
• H1/2  half-value layer
• H1  first [heart] sound; halistatin; protium
• ¹H, H¹  protium
• H₁  alternate hypothesis [statistics]
• H2  deuterium; second [heart] sound
• ²H, H²  deuterium
• H3, ³H, H³  tritium
• 4H  hypothalamic hamartoblastoma-hyperphalangeal hypoendocrine-hypoplastic anus [syndrome]
• H⁺  hydrogen ion
• [H⁺]   hydrogen ion concentration
• h  hand-rearing [of experimental animals]; heat transfer coefficient; hecto; height; henry; hour [Lat. hora]; human; hundred; hypodermic; negatively staining region of a chromosome; Planck constant; secondary constriction; specific enthalpy
• h-  hecto- [10²]
• HA  H antigen; Hakim-Adams [syndrome]; halothane anesthesia; Hartley [guinea pig]; headache; health affairs; health alliance; hearing aid; height age; hemadsorption; hemagglutinating antibody; hemagglutination; hemagglutinin; hemolytic anemia; hemophiliac with adenopathy; hepatic adenoma; hepatic artery; hepatitis A; hepatitis-associated; heteroduplex analysis; heterophil antibody; Heyden antibiotic; high anxiety; hippocampal asymmetry; hippuric acid; histamine; histocompatibility antigen; Horton arteritis; hospital administration; hospital admission; hospital apprentice; Hounsfield unit; human albumin; hyaluronic acid; hydroxyapatite; hydroxylamine; hyperalimentation; hyperandrogenism; hypersensitivity alveolitis; hypo-thalamic amenorrhea
• H/A  head to abdomen; headache
• 1HA  hydroxyapatite; hydroxylamine
• HA2  hemadsorption virus 2
• Ha  absolution hypermetropia; hafnium; hamster; Hartmann number
• ha  hectare
• HAA  hearing aid amplifier; hemolytic anemia antigen; hepatitis-associated antigen; hepatitis-associated aplastic anemia; hospital activity analysis
• HA Ag  hepatitis A antigen
• HAART  highly active antiretroviral therapy
• HAAS  Honolulu-Asia Aging Study
• hAAT  human α₁-antitrypsin
• HAB  harmful algal bloom; histoacryl blue
• HABA  2(4´-hydroxyazobenzene) benzoic acid
• HABF  hepatic artery blood flow
• HA-BP  high affinity binding protein
• HACCP  hazard analysis and critical control point system [food safety]
• HACE  high-altitude cerebral edema
• HACEK  Haemophilus, Actinobacillus, Cardiobacterium, Eikenella, Kingella
• HACER  hypothalamic area controlling emotional response
• HAChT  high affinity choline transport
• HACR  hereditary adenomatosis of the colon and rectum
• HACS  Hazard-Assessment Computer System; hyperactive child syndrome
• hACSP  human adenylate cyclase-stimulating protein
• HACT  health care activity [UMLS]
• HAD  health care alternatives development; hemadsorption; HIV-associated dementia; hospital administration, hospital administrator; hospital anxiety and depression [scale]; human immunodeficiency virus-associated dementia
• HAd  hemadsorption; hospital administrator
• HADD  hydroxyapatite deposition disease
• HADH  hydroxyacyl CoA dehydrogenase
• HAd-I  hemadsorption-inhibition
• HADS  hospital anxiety and depression scale
• HAdV 1-51  human adenoviruses 1 to 51
• HAdV-A, B, C, D, E, F  human adenoviruses A, B, C, D, E, and F
• HAE  health appraisal examination; hearing aid evaluation; hepatic artery embolism; hereditary angioneurotic edema
• Hae  Haemophilus influenzae aegyptius
• HAEC  Hirschsprung-associated enterocolitis; human aortic endothelial cell
• HAF  hepatocellular altered focus; hyperalimentation fluid
• HaF  Hageman factor
• HAFP  human alpha-fetoprotein
• HAG  heat-aggregated globulin
• HAGG  hyperimmune antivariola gammaglobulin
• HAGH  hydroxyacyl-glutathione hydrolase
• HAGL  humeral avulsion of glenohumeral ligament
• HAH  halogenated aromatic compound
• HAHS  Harvard Alumni Health Study
• HAHTG  horse antihuman thymus globulin
• HAI  hemagglutination inhibition; hepatic arterial infusion; hospital-acquired infection
• H&A Ins  health and accident insurance
• HAIR-AN  hyperandrogenism, insulin resistance, and acanthosis nigricans [syndrome]
• HaK  hamster kidney
• HAL  hand-assisted laparoscopy; Heart Attacks in London [study]; hepatic artery ligation; hybrid artificial liver; hypoplastic acute leukemia
• hal  halogen; halothane
• HALC  high affinity-low capacity
• HALF  high amplitude low frequency; Homocysteine, Atherosclerosis, Lipid and Familial Hypercholesterolemia [study]
• HALFD  hypertonic albumin-containing fluid demand
• halluc  hallucinations
• HALO  Halotestin
• HALP  hyperalphalipoproteinemia
• HALT  Hypertension and Lipid Trial
• HALT MI  Hu23F2G Anti-Adhesion to Limit Cytotoxic Injury Following Acute Myocardial Infarction [study]
• HALV  human acquired immunodeficiency syndrome lymphotropic virus
• HaLV  hamster leukemia virus
• HAM  hearing aid microphone; helical axis in motion; hemolymph anticoagulation medium; human albumin microsphere; human alveolar macrophage; human T-cell lymphotropic virus associated myelopathy; hypoparathyroidism, Addison disease, and mucocutaneous candidiasis [syndrome]
• HAM-1, 2  histocompatibility antigen modifier types 1 and 2
• HAm  human amnion
• HAMA  Hamilton anxiety [scale]; human anti-murine antibody
• HA-MA  methacrylated hyaluronic acid
• HAMD  Hamilton depression [scale]
• HAMDCT  Hospital Authority Master Disease Code Table [Hong Kong]
• HAMIT  Heparin in Acute Myocardial Infarction Trial
• HaMSV, Ha-MSV  Harvey murine sarcoma virus
• HAN  heroin-associated nephropathy; hyperplastic alveolar nodule
• HANA  hemagglutinin neuraminidase
• H and E  hematoxylin and eosin [stain]
• HANDI  Hemophilia and AIDS/HIV Network for the Dissemination of Information
• Handicp  handicapped
• HANE  hereditary angioneurotic edema; Hydrochlorothiazide, Atenolol, Nitrendipine, Enalapril [study]
• HANES  Health and Nutrition Examination Survey
• hANF  human atrial natriuretic factor
• h ANP  human atrial natriuretic peptide
• HANSA  Healthcare Advanced Networked System Architecture
• HAODM  hypoplasia anguli oris depressor muscle
• HAP  Handicapped Aid Program; Hazardous Air Pollutants [List]; hazardous air pollution; health alliance plan; hepatic arterial phase; heredopathia atactica polyneuritiformis; high-altitude peristalsis; histamine acid phosphate; hospital-acquired pneumonia; hospital admissions program; humoral antibody production; hydrolyzed animal protein; hydroxyapatite
• HAp  hydroxyapatite
• HAPA  hemagglutinating anti-penicillin antibody
• HAPC  high-amplitude peristaltic contraction; hospital-acquired penetration contact
• HAPE  high-altitude pulmonary edema
• HAPI  Heparin as an Alternative to Promote Patency in Acute Myocardial Infarction [study]
• HAPORT  Heart Attack Patient Outcome Research Team [study]
• HAPPHY  Heart Attack Primary Prevention in Hypertension
• HAPS  hepatic arterial perfusion scintigraphy
• HAPSA  Home Assessment Program for Successful Aging
• HaPV  hamster polyomavirus
• HAPVC  hemi-anomalous pulmonary venous connection
• HAPVD  hemi-anomalous pulmonary venous drainage
• HAPVR  hemi-anomalous pulmonary venous return
• HaPyV  hamster polyomavirus
• HAQ  health assessment questionnaire
• HAR  head airway region; high-altitude retinopathy
• HARD  hydrocephalus-agyria-retinal dysplasia [syndrome]
• HARD +/- E  hydrocephalus-agyria-retinal dysplasia plus or minus encephalocele [syndrome]
• HAREM  heparin assay rapid easy method
• HARH  high-altitude retinal hemorrhage
• HARM  harmonics from the injected signal; heparin assay rapid method
• HAROLD  Hypertension and Ambulatory Recording in the Old
• HARP  Harvard Atherosclerosis Reversibility Project; homeless and at-risk population; hospital admission risk profile
• HARS  histidyl-ribonucleic acid [RNA] synthetase; human AIDS [acquired immunodeficiency syndrome] reporting system
• HART  Heparin-Aspirin Reperfusion Trial; hyperfractionated accelerated radiation therapy; Hypertension Audit of Risk Factor Therapy [study]
• HART II  Heparin and Reperfusion Therapies [study]
• HARTS  Hoechst Adverse Reaction Terminology System
• HAS  Hamilton Anxiety Scale; health advisory service; health-assessment system; Helsinki Ageing Study; Hemostatic System Activation Substudy; highest asymptomatic [dose]; Hirulog Angioplasty Study; hospital administrative service; hospital advisory service; human albumin solution; hydrocephalus due to stenosis of the aqueduct of Sylvius; hyperalimentation solution; hypertensive arteriosclerotic
• HASCVD  hypertensive arteriosclerotic cardiovascular disease
• HASHD  hypertensive arteriosclerotic heart disease
• HASI  Hirulog Angioplasty Study Investigators
• HASM  human airway smooth muscle
• HASMC  human aortic smooth muscle cell
• HASP  Hospital Admissions and Surveillance Program
• HASS  highest anxiety subscale score
• HASTE  half-Fourier acquisition single shot turbospin echo
• HAstV 1-8  human astroviruses 1 to 8
• HAT  Halsted Aphasia Test; head, arm, trunk; heparin-associated thrombocytopenia; heterophil antibody titer; histone acetyltransferase; home asthma telemonitoring; hospital arrival time; human African trypanosomiasis; hypoxanthine, aminopterin, and thymidine; hypoxanthine, azaserine, and thymidine
• 3-HAT  3-hydroxyanthranilic acid
• HATG  horse antihuman thymocyte globulin
• HATH  Heterosexual Attitudes Toward Homosexuality [scale]
• HATT  heparin-associated thrombocytopenia and thrombosis
• HATTS  hemagglutination treponemal test for syphilis
• HaTx  hanatoxin
• HAU  hemagglutinating unit
• HAV  hemadsorption virus; hepatitis A virus
• HAVOC  Hematoma and Vascular Outcome Complications [study]
• HAVS  hand-arm vibration syndrome
• HAWIC  Hamburg-Wechsler Intelligence Test for Children
• HAZ  height-for-age Z-score
• HAZMAT  hazardous material
• HAZOP  hazard and operability
• HAZR  hazardous substance [UMLS]
• HAZUS  Hazard US [loss estimation methodology]
• HAZWOPER  hazardous waste operations and emergency response
• HB  health board; heart block; heel to buttock; held back; hemoglobin; hepatitis B; His bundle; hold breakfast; housebound; hybridoma bank; hyoid body
• Hb  hemoglobin
• HBA  bundle of His electrogram; heated blood agar [test]
• HbA  hemoglobin A, adult hemoglobin
• HBA₁  glycosylated hemoglobin
• HBAb  hepatitis B antibody
• HBABA  hydroxybenzeneazobenzoic acid
• HbA1c, HbA_1c  glycosylated hemoglobin
• HBAg  hepatitis B antigen
• HB_sAG  hepatitis B surface virus
• HBB  hemoglobin beta-chain; hospital blood bank; hydroxybenzyl benzimidazole
• HbBC  hemoglobin binding capacity
• HBBW  hold breakfast blood work
• HBC  hereditary breast cancer
• HBC, HBc, HB_c  hepatitis B core [antigen]
• HbC  hemoglobin C
• HBCAB, HBcAb  hepatitis B core antibody
• HBCAG, HBcAg, HB_cAg  hepatitis B core antigen
• HBCG  heat-aggregated Calmette-Guerin bacillus
• HbCO  carboxyhemoglobin
• Hb CS  hemoglobin Constant Spring
• HBCT  helical biphasic contrast-enhanced computed tomography
• HbCV  Haemophilus influenzae conjugate vaccine
• HBD  has been drinking; homozygous-by-descent; hydroxybutyric dehydrogenase; hypophosphatemic bone disease
• HbD  hemoglobin D
• HBDH  hydroxybutyrate dehydrogenase
• hBDNF  human brain derived neurotrophic factor
• HBDT  human basophil degranulation test
• HBE  His bundle electrogram
• HbE  hemoglobin E
• HB_e  hepatitis B early antigen
• HBeAb/Ag  hepatitis B e antibody/antigen
• HBEAG, HB_eAg, HBeAg  hepatitis B early antigen
• HBEC  human brain endothelial cell
• HB-EGF  heparin-binding epidermal growth factor
• HBF  hand blood flow; hemispheric blood flow; hemoglobinuric bilious fever; hepatic blood flow; hypothalamic blood flow
• HbF  fetal hemoglobin, hemoglobin F
• Hbg  hemoglobin
• HBGF  heparin-binding growth factor
• HBGM  home blood glucose monitoring
• HBGR  hemoglobin-gamma regulator
• HbH  hemoglobin H
• HBHC  hospital-based home care
• HBHCT  hospital-based home care team
• Hb-Hp  hemoglobin-haptoglobin [complex]
• HBI  hemibody irradiation; high serum-bound iron
• HBIG, HBIg  hepatitis B immunoglobulin
• HBL  hepatoblastoma

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