--A--

A

adult

A & O

alert and oriented

A & P

anterior and posterior

A-fib

atrial fibrillation 

A-flutter

atrial flutter

A-R pulse

apical-radial pulse

A/P

Anterior/Posterior

A2 & P2

aortic valve second sound, pulmonic valve second sound

AA

Alcoholics Anonymous

AAA

abdominal aortic aneurysm

AAROM

active assisted range of motion

AB

abortion

ABC

automated blood count

ABCD

automated blood count with differential

abd

abdomen

ABG

arterial blood gas

Abnl

abnormal

ABR

auditory brainstem response

ABS

acute brain syndrome

Ac

[L. ante cibum]  before meals

ACEI  

angiotensin converting enzyme inhibitor

ACLS

advanced cardiac life support

ACS

American Cancer Society

ACSW

Academy of Certified Social Workers

ACT

activated clotting time

AD

[L. auris dextra] right ear

Ad lib

[L. ad libitum] as desired

ADA

American Diabetes Association, American Dietetic Association,
Americans with Disabilities Act

ADHD  

attention deficit disorder (hyperactivity)

ADL

activities of daily living

Adm

admission  

Adol.

Adolescent

AE

above elbow

AED

anti-epileptic drug

AFB

acid fast bacillus

AFO

ankle-foot orthosis

AFP

a-fetoprotein

AGA

appropriate-for-gestational age

AGN

acute glomerulonephritis

AHA

American Heart Association

AI

aortic insufficiency

AICD

automatic internal cardiac defibrillator

AIDS

acquired immunodeficiency syndrome

AK

above knee

AKA

above knee amputation

alk

alkaline

alk phos

alkaline phosphatase

ALL

acute lymphocytic leukemia

ALS 

Advanced Life Support

ALTE 

Acute Life Threatening Episode

am

[L. ante meridiem]  being before noon

AMA

against medical advice

amb

ambulatory

AMI

acute myocardial infarction 

AML

acute myelogenous leukemia

amp

ampule,  amputation

amt

amount

ANA

antinuclear antibody

anes

anesthesia

ant

anterior

ante

[L. ante]  before  

AODM

adult onset diabetes mellitus

AP and LAT

anteroposterior and lateral

APCM

Assistant Patient Care Manager

APH

Adult Partial Hospitalization

approx

approximately

appt

appointment

aPTT

activated partial thromboplastin time

Aq

aqueous

ARF

acute renal failure

ARM

age-related maculopathy

AROM

artificial rupture of membranes;  active range of motion

art

artery, arterial

AS

aortic stenosis; [L. auris sinistra] left ear

as tol

as tolerated

ASA

aspirin;  American Society of Anesthesiologists

ASAP

as soon as possible

ASCVD

arteriosclerotic/atherosclerotic cardiovascular disease

ASD

atrial septal defect

ASHD

arteriosclerotic/atherosclerotic heart disease

ASO titer

antistreptolysin-O titer

ASPVD

arteriosclerotic peripheral vascular disease

assist  

assistance

ATN 

acute tubular necrosis

ATP  

acute tonsillar pharyngitis

ATU

Antenatal Testing Unit

AU

[L. aures unitas]  both ears together

Au-198

gold 198

AUC

area under the curve

AUD

Audiology

AUI

Alcohol Use Inventory

AVM

arteriovenous malformation

AVN

avascular necrosis

AWAS

Alcohol Withdrawal Assessment

AWOL

absent without leave 

Ax

axillary