Dictionary of Medical Acronyms & Abbreviations

[ A ]

• AMPLE  allergies, medications, past medical history, last meal, events preceding present condition
• A-M pr  Austin-Moore prosthesis
• Amp-RT  amplified reverse transcriptase
• AMPS  abnormal mucopolysacchariduria; acid mucopolysaccharide
• AMPT  active mouse protection test; alpha-methylparatyrosine
• ampul  ampule
• AMR  acoustic muscle reflex; activity metabolic rate; acute mitral regurgitation; alopecia-mental retardation [syndrome]; alternate motion rate; alternating motion reflex; ambulatory medical record
• AMRA  American Medical Record Association
• AMRF  American Medical Resources Foundation
• AMRI  anteromedial rotatory instability
• AMRL  Aerospace Medical Research Laboratory
• AMRNL  Army Medical Research and Nutrition Laboratory
• AMRO  Amsterdam-Rotterdam Trial Comparing Excimer Laser and Percutaneous Transluminal Coronary Angioplasty
• AMRS  ambulatory medical records system; automated medical record system
• AMS  ablepharon-microstomia syndrome; accelerator mass spectrometry; act management system; acute mountain sickness; adenosylmethionine synthetase; advanced large-scale integrated computational environment [ALICE] memory snooper; advanced medical systems [fetal monitor]; aggravated in military service; altered mental status; American Microscopical Society; amount of substance; amylase; antimacrophage serum; Army Medical Service; aseptic meningitis syndrome; Association of Military Surgeons; auditory memory span; automated multiphasic screening
• ams  amount of a substance
• AMSA  acridinylamine methanesulfon-m-anisidide; American Medical Society on Alcoholism; American Medical Students Association; amsacrine
• AMSAODD  American Medical Society on Alcoholism and Other Drug Dependencies
• AMSC  Army Medical Specialist Corps
• AMSP  Association of Medical School Pharmacology
• AMSRDC  Army Medical Service Research and Development Command
• AMSU  ambulatory minor surgery unit
• AMT  acute miliary tuberculosis; Adenosine Scan Multicenter Trial; alpha-methyltyrosine; American Medical Technologists; amethopterin; amitriptyline; amniotic membrane transplantation; amphetamine; anxiety management training; atherogenic metabolic triad
• amt  amount
• AMTV  Arumowot virus
• amt/vol  amount/volume
• AMU  Army Medical Unit
• amu  atomic mass unit
• AmuLV  Abelson murine leukemia virus; amphotrophic murine leukemia virus
• AMV  alfalfa mosaic virus; apex to mitral valve; assisted mechanical ventilation; asteroid mosaic virus; avian myeloblastosis virus
• AMVF  additive multiattribute value function
• AMVI  acute mesenteric vascular insufficiency
• aMVL  anterior mitral valve leaflet
• AMWA  American Medical Women's Association; American Medical Writers' Association
• AMX  advanced multiprocessor extension; amoxicillin
• AMY, amy  amylase
• AMyA  antimyocardial antibody
• AN  acanthosis nigricans; acetylnitrile; acne neonatorum; acoustic neuroma; adult, normal; ala nasi; amyl nitrate; aneurysm; anisometropia; anode; anorexia nervosa; antenatal; anterior; antineuraminidase; aseptic necrosis; atmosphere normal; atrionodal; autonomic neuropathy; avascular necrosis
• A/N  antenatal; as needed
• An  actinon; anisometropia; anode, anodal; antigen; Aspergillus niger; atmosphere normal
• A_n  atmosphere normal
• A1-NA  A1 area of the nucleus ambiguus
• ANA  acetylneuraminic acid; American Narcolepsy Association; American Neurological Association; American Nurses Association; anesthesia [anaesthesia]; antibody to nuclear antigens; antinuclear antibody; aspartyl naphthylamide
• Ana  anaplastic
• ANAD  anorexia nervosa with associated disorders
• ANAE  alpha-naphthyl acetate esterase
• ANAG  acute narrow angle glaucoma
• AnaINH  anaphylotoxin inhibitor
• ANAL, anal  analgesia, analgesic; analysis, analytic
• ANAM  automated neuropsychological assessment metrics
• ANAP  agglutination negative, absorption positive [reaction]
• ANAS  anastomosis; auditory nerve activating substance
• ANASCD  American Nurses Association Steering Committee on Databases
• anast  anastomosis
• ANAT  anatomic structure [UMLS]
• Anat, anat  anatomy, anatomist
• ANAV  Anopheles A virus
• ANB  avascular necrosis of bone
• ANBN  alpha-nitroso-beta-naphthol
• ANBP  Australian National Blood Pressure [trial]
• ANBV  Anopheles B virus
• ANC  absolute neutrophil count; acid neutralization capacity; active noise control [MRI]; adaptive or noise canceler; adult neuronal ceroid [lipofuscinosis]; ancestor [UMLS]; antigen-neutralizing capacity; Army Nurse Corps
• ANC₁  ancestor, first level in hierarchy [UMLS]
• ANCA  antineutrophilic cytoplasmic antibody
• ANCC, AnCC  anodal closure contraction
• ANCHR  Access to National Claims History Repository [Medicare database]
• ANCL  adult neuronal ceroid lipofuscinosis
• ANCOVA  analysis of covariance
• ANCR  Association of the Nordic Cancer Registries
• AND  algoneurodystrophy; anterior nasal discharge
• ANDA  Abbreviated New Drug Application
• ANDRO, andro  androsterone
• ANDTE, AnDTe  anodal duration tetanus
• ANDV  Andasibe virus; Andes virus
• anes, anesth  anesthesia, anesthetic
• ANESR  apparent norepinephrine secretion rate
• AnEx, an ex  anodal excitation
• ANF  alpha-naphthoflavone; American Nurses' Foundation; antineuritic factor; antinuclear factor; atrial natriuretic factor
• AnfaMNPV  Anagrapha falciform multiple nucleopolyhedrovirus
• ANFIS  adaptive neuro-fuzzy inference system
• ANFO  ammonium nitrate-fuel oil [bomb]
• ANG  angiogenin; angiogram, angiography; angiotensin
• Ang II, ANGII  angiotensin II
• ang  angiogram, angiography; angle, angular
• ANGEL  a new global environment for learning [computer-assisted]
• ANGFA  antinerve growth factor antibody
• Ang GR  angiotensin generation rate
• AngHV  anguillid herpesvirus
• Angio , angiogram, angiographicangiography
• ang pect  angina pectoris
• ANH  academic nursing home
• anh  anhydrous
• ANHV  Anhanga virus
• AnHV  anatid herpesvirus
• ANI  acute nerve irritation
• ANIA  automated nephelometric immunoassay
• ANIM  animal [UMLS]
• ANIMAL  automatic nonlinear image matching and anatomical labeling
• ANIR  Advanced Networking Infrastructure and Research [National Science Foundation]
• ANIS  Anorexia Nervosa Inventory for Self-rating
• aniso  anisocytosis
• ANIT  alpha-naphthyl-isothiocyanate
• ANK, Ank  ankyrin
• ank  ankle
• ANL  acute nonlymphoblastic leukemia
• ANLI  antibody-negative with latent infection
• ANLL  acute nonlymphocytic leukemia
• ANN  artificial neural network
• Ann  annual
• ANNA  antineutrophil nuclear antibody
• ann fib  annulus fibrosus
• ANNP  artificial neural network processor
• ANOC, AnOC  anodal opening contraction
• ANOCL  anodal opening clonus
• ANOCOVA  analysis of covariance [statistics]
• ANOP  anophthalmia
• ANOV, ANOVA  analysis of variance [statistics]
• ANP  acute necrotizing pancreatitis; adult nurse practitioner; advanced nurse practitioner; ancillary nursing personnel; A-norprogesterone; atrial natriuretic peptide
• ANP-A  atrial natriuretic peptide A
• ANP-B  atrial natriuretic peptide B
• ANP-C  atrial natriuretic peptide C
• A-NPP  absorbed normal pooled plasma
• ANRC  American National Red Cross
• ANRL  antihypertensive neutral renomedullary lipid
• ANS  acanthion; American National Standards; American Nimodipine Study; American Nutrition Society; 8-anilino-1-naphthalene-sulfonic acid; anterior nasal spine; antineutrophilic serum; antirat neutrophil serum; Army Nursing Service; arterionephrosclerosis; Associate in Nursing Science; autonomic nervous system
• ANSCII  American National Standard Code for Information Interchange
• ANSI  American National Standards Institute
• ANSI-HISPP  American National Standards Institute Healthcare Informatics Standards Planning Panel
• AN-SIR  advice nurse structured implicit review [telemedicine]
• ANSWER  Agency for Toxic Substances and Disease Registry/National Library of Medicine's Workstation for Emergency Response
• ANT  acoustic noise test; adenine nucleotide translocator; aminonitrothiazole; anterior
• ant  anterior; antimycin
• AntA  antimycin A
• antag  antagonist
• ANTENOX  [Switch to oral] Anticoagulant from Enoxaparin [in treatment of acute deep venous thrombosis]
• Anth-Gly  anthraquinone-glycine [conjugate]
• Anth-IDA  anthraquinone-iminodiacetate [conjugate]
• anti-HB_c  antibody to hepatitis B core antigen
• anti-HB_e  antibody to hepatitis B early antigen
• anti-HB_s  antibody to hepatitis B surface antigen
• anti-PNM Ab  anti-peripheral nerve myelin antibody
• AntLV  Anthriscus latent virus
• ANTR  apparent net transfer rate
• ANTU  alpha-naphthylthiourea
• ANTV  Antequera virus
• ANT3Y  adenine nucleotide translocator 3 Y
• ANU  artificial neural unit
• ANuA  antinuclear antibody
• ANUG  acute necrotizing ulcerative gingivitis
• ANUV  Ananindeua virus
• ANV  avian nephritis virus
• AnV-S  Aspergillus niger virus S
• ANX  annexin
• anx  anxiety
• ANZ  Australia and New Zealand [heart failure collaborative study]
• AO  abdominal aorta; abdominally obese; achievement orientation; acid output; acridine orange; age of onset; ankle orthosis; anodal opening; anterior oblique; antisense oligonucleotide; aorta; aortic opening; arthro-ophthalmopathy; assessment-object; atelosteogenesis; atomic orbital; atrioventricular [valve] opening; average optical [density]; axio-occlusal
• Ao  aorta; Aspergillus ochraceus
• A_o  orifice area
• A/O  atlanto-occipital
• A&O, A/O  alert and oriented
• AOA  Administration on Aging; Alpha Omega Alpha Honor Society; American Optometric Association; American Orthopedic Association; American Orthopsychiatric Association; American Osteopathic Association; ascending aorta
• AoA  age of acquisition
• AOAA  amino-oxyacetic acid
• AOAC  Association of Official Agricultural Chemists
• AOAP  as often as possible
• AoArE  aortic arch epinephrine
• AOAS  American Osteopathic Academy of Sclerotherapy
• AOB  accessory olfactory bulb; alcohol on breath
• AOBEM  American Osteopathic Board of Emergency Medicine
• AOBS  acute organic brain syndrome
• AOC  abridged ocular chart; allyloxycarbonyl; amyloxycarbonyl; anodal opening contraction; area of concern
• AOCA  American Osteopathic College of Anesthesiologists
• AOCD  American Osteopathic College of Dermatology
• AOCl  anodal opening clonus
• AOCN  advanced oncology certified nurse
• AOCPA  American Osteopathic College of Pathologists
• AOCPR  American Osteopathic College of Proctology
• AOCR  American Osteopathic College of Radiology; American Osteopathic College of Rheumatology
• AOD  Academy of Operative Dentistry; Academy of Oral Dynamics; adult-onset diabetes; anesthesiologist-on-duty; arterial oxygen desaturation; arteriosclerotic occlusive disease; auriculo-osteodysplasia
• AODM  adult-onset diabetes mellitus
• AODME  Academy of Osteopathic Directors of Medical Education
• AODP  alcohol and other drug problems
• AOE  admission order entry
• AoE  aortic epinephrine
• AOHA  American Osteopathic Hospital Association
• AoHV  aotine herpesvirus
• AOI  apnea of infancy
• AoIR  Association of Internet Researchers
• AOIVM  angiographically occult intracranial vascular malformation
• AOL  acro-osteolysis
• AOM  acute otitis media; alternatives of management; arthroophthalmopathy; azoxymethane
• AOMA  American Occupational Medical Association
• AOMP, AoMP  aortic mean pressure
• AON  anterior olfactory nucleus
• AONE  American Organization of Nurse Executives
• AOO  anodal opening odor; atrial asynchronous (competitive, fixed-rate) [pacemaker]
• AOP  anodal opening picture; aortic pressure
• AoP  aortic pressure
• AOPA  American Orthotics and Prosthetics Association
• AOPC  adult outpatient psychotherapy clinic
• AOPW, AoPW  aortic posterior wall
• AOR  adjusted odds ratio; Alvarado Orthopedic Research [instruments]; auditory oculogyric reflex
• AORN  Association of Operating Room Nurses
• AOS  American Ophthalmological Society; American Otological Society; anodal opening sound; anterior [o]esophageal sensor
• A_2-OS  aortic second sound, opening snap
• AOSF  adaptive order statistic filter
• AOSSM  American Orthopedic Society for Sports Medicine
• AOT  accessory optic tract; acute occlusive thrombus or thrombosis; Anderson Olsson table; anodal opening tetanus; Association of Occupational Therapists
• AOTA  American Occupational Therapy Association
• AOTe  anodal opening tetanus
• AOTF  American Occupational Therapy Foundation
• AOU  apparent oxygen utilization
• AOV  aortic valve
• AoV  aortic valve; Aspergillus ochraceus virus
• AP  abdominal pain; abdominal [voiding] pressure; abdominoperitoneal; accelerated phase; accessory pathway; accounts payable; acid phosphatase; acinar parenchyma; action plan; action potential; activator protein; active pepsin; active pressure; acute pancreatitis; acute phase; acute pneumonia; acute proliferative; adductor pollicis [muscle]; adenomatous polyposis; adolescent psychiatry; after parturition; agno protein; alkaline phosphatase; alum precipitated; aminopeptidase; aminopyrine; amyloid P-component; amyloid peptide; anatomic profile; angina pectoris; antepartal [Lat. ante partum]; anterior pituitary; anteroposterior; antidromic potential; antiplasmin; antipyrine; antiviral protein; antral peristalsis; aortic pressure; aortopulmonary; apical pulse; apothecary; appendectomy; appendicitis; appendix; apurinic acid; apurinic/apyrimidinic [site in DNA]; area postrema; arithmetic progression; arterial pressure; artificial pneumothorax; aspiration pneumonia; assessment and plans; association period; atherosclerotic plaque; atrial pacing; atrioventricular pathway; attending physician; axiopulpal; before parturition [Lat. ante partum]
• A-P  anteroposterior
• A&P  anterior and posterior; assessment and plans; auscultation and percussion
• A/P  abdominal/perineal; antepartum; ascites/plasma [ratio]
• A₂ P₂  aortic second sound, pulmonary second sound
• 4-AP  4-aminopyridine
• Ap  apex
• A_p  amount in plasma
• aP  acellular pertussis [vaccine]
• ap  anteroposterior; attachment point
• APA  action potential amplitude; aldosterone-producing adenoma; Ambulatory Pediatric Association; American Pancreatic Association; American Pharmaceutic Association; American Physiotherapy Association; American Podiatric Association; American Psychiatric Association; American Psychoanalytic Association; American Psychological Association; American Psychopathological Association; American Psychotherapy Association; aminopenicillanic acid; anterior margin of pulmonary artery; antipernicious anemia [factor]; antiphospholipid antibody; antiproliferative antibody; arcuate premotor area; azidophenacyl
• ApA  adenylyl (3´-5´) adenosine; azidophenacyl
• APAAP  alkaline phosphatase-antialkaline phosphatase [labeling]
• APAB  antiphospholipid antibody; azidophenacyl bromide
• APACHE  Acute Physiology, Age, and Chronic Health Evaluation
• APACS  analog picture archiving and communication system
• APAF  antipernicious anemia factor
• APAMI  Asian Pacific Association of Medical Informatics
• APAN  Asian-Pacific Advanced Network
• APAP  acetaminophen; adaptive positive airway pressure
• APASS  Antiphospholipid Antibodies in Stroke Studies
• APB  abductor pollicis brevis; atrial premature beat
• APBD  adult polyglucosan body disease
• APC  acetylsalicylic acid, phenacetin, and caffeine; activated protein C; adenoidal-pharyngeal-conjunctival [agent]; adenomatous polyposis coli; allophyocyanin; all-purpose capsule; angiotensin presenting cell; antigen-presenting cell; antiphlogistic corticoid; aortopulmonary collateral artery; aperture current; apneustic center; argon plasma coagulation; Association for Practitioners in Infection Control; aspirin-phenacetin-caffeine; atrial premature contraction; autologous platelet concentrate
• aPC  activated protein C
• ApCAM  aplasia cell adhesion molecule
• APCC  aspirin-phenacetin-caffeine-codeine
• APCD  acquired prothrombin complex deficiency [syndrome]; adult polycystic kidney disease
• APCF  acute pharyngoconjunctival fever
• APCG  apex cardiogram
• Ap4CH  apical four-chamber plane
• APCKD  adult-type polycystic kidney disease
• ApCPV  Anaitis plagiata cypovirus; Antheraea pernyi cypovirus
• APC-R, APCR  activated protein C resistance
• APD  acquired perforating dermatosis; action potential duration [of heart]; acute polycystic disease; adult polycystic disease; advanced physical diagnosis; airway pressure disconnect; anteroposterior diameter; antipsychotic drug; articulation-phonological disorders; atrial premature depolarization; autoimmune progesterone dermatitis; automated peritoneal dialysis; avalanche photodiodes
• APD₈₀  action potential duration at 80% repolarization
• A-PD  anteroposterior diameter
• APD_b  [heart] action potential duration-baseline beat
• APDF  amplitude probability density function
• APDI  Adult Personal Data Inventory
• APDIM  Association of Program Directors in Internal Medicine
• ApDNV  Aedes pseudoscutellaris densovirus
• APD_p  [heart] action potential duration-premature stimulus
• AP-DRG  all patients-diagnosis-related group
• APE  acetone powder extract; acute polioencephalitis; acute psychotic episode; acute pulmonary edema; airway pressure excursion; aminophylline, phenobarbital, and ephedrine; anterior pituitary extract; asthma of physical effort; avian pneumoencephalitis
• APECED  autoimmune polyendocrinopathy-candidosis-ectodermal dystrophy
• ApEn  approximate entropy
• APES  aminopropyltriethoxysilane
• APEUV  Apeu virus
• APEX  automatic programmable electronic matrix
• APF  acidulated phosphofluoride; adaptive pattern filtering; American Psychological Foundation; anabolism-promoting factor; animal protein factor; antiperinuclear factor; assigned protection factor
• APG  acid-precipitated globulin; air plethysmography; ambulatory patient group; animal pituitary gonadotropin; antegrade pyelography
• APGAR  American Pediatric Gross Assessment Record
• APGL  alkaline phosphatase activity of granular leukocytes
• APGO  Association of Professors of Gynecology and Obstetrics
• APH  alcohol-positive history; alternative pathway hemolysis; aminoglycoside phosphotransferase; antepartum hemorrhage; anterior pituitary hormone; Association of Private Hospitals
• Aph  aphasia
• APHA  American Protestant Hospital Association; American Public Health Association
• APhA  American Pharmaceutical Association
• APHEA  Air Pollution in Health, European Approach
• APHIS  Animal and Plant Health Inspection Service
• APHL  Association of Public Health Laboratories
• APHP  anti-Pseudomonas human plasma
• API  alkaline protease inhibitor; Analytical Profile Index; annual parasitological index; application program interface; applications programming interface; arterial pressure index; atmospheric pressure ionization; Autonomy Preference Index
• APIC  Acenocoumarin vs Pentoxifylline in Intermittent Claudication [trial]; Association for Practitioners in Infection Control
• APIE  assessment, plan, implementation, and evaluation
• APIM  Association Professionnelle Internationale des Medecins
• APIP  additional personal injury protection
• APIS  Antihypertensive Patch, Italian Study
• APIVR  artificial pacemaker-induced ventricular rhythm
• aPKC  atypical protein kinase C
• APKD  adult-onset polycystic kidney disease
• APL  abductor pollicis longus; accelerated painless labor; acute promyelocytic leukemia; animal placenta lactogen; anterior pituitary-like; anterior pulmonary leaflet
• aPL  antiphospholipid
• A-P&L  anteroposterior and lateral
• APLA, aPLA  antiphospholipid antibody
• APLAUD  Antiplatelet Useful Dose [trial]
• APLAUSE  Antiplatelet Treatment After Intravascular Ultrasound Guided Optimal Stent Expansion [trial]
• APLP  amyloid precursor-like protein
• APLPV  American plum line pattern virus
• APLS  advanced pediatric life support
• APLV  Andean potato latent virus
• APM  Academy of Parapsychology and Medicine; Academy of Physical Medicine; Academy of Psychosomatic Medicine; acid precipitable material; admission pattern monitoring; affected pedigree member; alternating pressure mattress; anterior papillary muscle; anteroposterior movement; apical plasma membrane; aspartame; Association of Professors of Medicine
• APML  acute promyelocytic leukemia
• APMOMS  Advisory Panel on the Mission and Organization of Medical Schools
• APMoV  Andean potato mottle virus
• APMR  Association for Physical and Mental Retardation
• APMV  avian paramyxovirus
• ApMV  apple mosaic virus
• APN  acute pyelonephritis; advanced practice nurse; average peak noise
• APNCU  adequacy of prenatal care utilization
• APNH  antiporter sodium-hydrogen ion
• APO  abductor pollicis obliquus; acquired pendular oscillation; Adriamycin, prednisone, vincristine; adverse patient occurrence; aphoxide; apolipoprotein; apomorphine; apoprotein
• Apo, apo  apolipoprotein
• APOA, apoA  apolipoprotein A
• APOB, apoB  apolipoprotein B
• APOC  African Program for Onchocerciasis Control; apolipoprotein C
• apoC  apolipoprotein C
• APOE, apoE  apolipoprotein E
• APOIV  Apoi virus
• APOJ, apoJ  apolipoprotein J
• APORF  acute postoperative renal failure
• apoth  apothecary
• APP  acute phase protein; alum-precipitated pyridine; aminopyrazolopyrimidine; amyloid peptide precursor; amyloid precursor protein; antiplatelet plasma; aqueous procaine penicillin; automated physiologic profile; average pixel projection; avian pancreatic polypeptide
• App, app  appendix
• APPA  American Psychopathological Association; 4-aminophenylacetic acid
• appar  apparatus
• APPC  application or advanced program-to-program communication
• APPCPT  atom and physicochemical property class pair and torsion
• APPCR, AP-PCR  arbitrarily primed polymerase chain reaction
• APPG  aqueous procaine penicillin G
• APPI  Active Persantine in Postischemic Injury [study]
• appl  appliance; application, applied
• APPROACH  Alberta Provincial Project for Outcomes Assessment in Coronary Heart Disease
• approp  appropriate
• approx  approximate
• APPS  amyloid precursor protein secretase
• APPT  Adolescent Pediatric Pain Tool
• Appt, appt  appointment
• appx  appendix
• appy  appendectomy
• APR  abdominoperineal resection; absolute proximal reabsorption; acute phase reaction or reactant; air-purifying respirator; amebic prevalence rate; anatomic porous replacement; anterior pituitary reaction; average payment rate
• APRAIS  Acute Phase Reactions and Ischemic Coronary Syndromes
• APRAISE  Antisense to Prevent Restenosis After Intervention, Stent Evaluation
• aprax  apraxia
• APRICOT  Antithrombotics in the Prevention of Reocclusion in Coronary Thrombolysis [trial]; Aspirin vs Coumadin Trial; Aspirin vs Coumadin in the Prevention of Reocclusion and Recurrent Ischemia after Successful Thrombolysis Trial
• APRL  American Prosthetic Research Laboratory
• AProL  acute promyelocytic leukemia
• APRP  acidic proline-rich protein; acute phase reactant protein
• APRT  adenine phosphoribosyl transferase
• APRV  airway pressure release ventilation
• APS  acute physiology score; adenosine phosphosulfate; advanced photon source; American Pain Society; American Pediatric Society; American Physiological Society; American Proctologic Society; American Prosthodontic Society; American Psychological Society; American Psychosomatic Society; aminopropylsilane; ammonium persulfate; analog processing stage; annual person summary [Medicare data file]; antiphospholipid antibody syndrome; attending physician's statement; Australian Psychological Society; autoimmune polyglandular syndrome; automated patent system; prostate-specific antigen
• APSAC  acylated plasminogen-streptokinase activator complex; anisoylated plasminogen streptokinase activator complex
• APSD  aorticopulmonary septal defect
• APSGN  acute poststreptococcal glomerulonephritis
• APSIS  Angina Prognosis Study in Stockholm; Angina Prognosis Study with Isoptin and Seloken [trial]
• APSP  assisted peak systolic pressure
• APSQ  Abbreviated Parent Symptom Questionnaire
• APSS  Association for the Psychophysiological Study of Sleep
• APSU  Australian Paediatric Surveillance Unit
• APT  Ablate and Pace Trial; alum-precipitated toxoid; aminophenylthioether; antiplatelet trials; applied potential tomography; automatic peak tracing
• APTA  American Physical Therapy Association
• APTD  Aid to Permanently and Totally Disabled
• APTES  γ-aminopropyltriethoxysilane
• APTF  American Physical Therapy Foundation
• APTH  ambulatory blood pressure monitoring and treatment of hypertension
• APTI  airway pressure time index
• APTT, aPTT  activated partial thromboplastin time
• APUD  amine precursor uptake and decarboxylation
• APV  abnormal posterior vector; Acyrthosiphon pisum virus; amprenavir
• aPV  acellular pertussis vaccine
• APVC  anomalous pulmonary venous connection
• APW  alkaline peptone water
• APWS  attending physician work station
• AQ  achievement quotient; acoustic quantification; anthraquinone; any quantity; aphasia quotient
• aq  aqueous; water [Lat. aqua]
• AQAB  acquired abnormality [UMLS]
• AQCESS  Automated Quality of Care Evaluation Support System
• AQIS  Australian Quarantine and Inspection Service
• AQL  acceptable quality level
• AQLQ  Asthma Quality of Life Questionnaire
• AQMS  acute quadriplegic myopathy syndrome
• AQP  aquaporin
• AQS  additional qualifying symptoms
• aqu  aqueous
• AR  absolute risk; acceptable risk; accounts receivable; achievement ratio; actinic reticuloid [syndrome]; active resistance; acute rejection; acute relapse; adherence ratio; admission rate; admitting room; adrenergic receptor; adrenodoxin reductase; airway resistance; alarm reaction; alcohol related; alkali reserve; allergic rhinitis; allowance region [radiotherapy]; alloy restoration; ambulance report; amphiregulin; amplitude ratio; analytical reagent; androgen receptor; anterior root; aortic regurgitation; apical-radial; Argyll Robertson [pupil]; aromatase; arsphenamine; articulare; artificial respiration; ascorbate reductase; assisted respiration; at risk; atrial rate; atrial reversal; atrophic rhinitis; augmented reality [computer graphics]; autoradiography; autoregressive; autosomal recessive
• A₁R  adenosine A₁ receptor
• Ar  argon; articulare
• A_r  relative atomic mass
• ar  aromatic
• A/R  apical/radial
• A&R  advised and released
• ARA  Academy of Rehabilitative Audiometry; acetylene reduction activity; adenine regulating agent; American Rheumatism Association; anorectal agenesis; antireticulin antibody; aortic root angiogram; arabinose; Associate of the Royal Academy; Axenfeld-Rieger anomaly
• ara  arabinose
• ara-A  adenine arabinoside
• Ara-C  arabinosylcytidine
• ara-C  cytosine arabinose; cytosine arabinoside
• ARAL  adjustment reaction to adult life
• ARAM  antigen recognition activation motif
• ARAMIS  American Rheumatism Association Medical Information System
• A_RAO  angiographic area of right anterior oblique projection
• ARAS  ascending reticular activating system
• ara-U  arabinosyluracil
• ARAV  Araguari virus
• ARB  adrenergic receptor binder; angiotensin receptor blocker
• arb  arbitrary unit