Abbreviation A

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AAA

abdominal aortic aneurysm

A-a gradient

alveolar to arterial gradient

AAD

antibiotic-associated diarrhea

AAO

alert, awake, and oriented

A&O

alert & oriented

AAS

acute abdominal series

ABD

abdomen

ABG

arterial blood gas

AC

before eating

ACLS

advanced cardiac life support

ACTH

adrenocorticotropic hormone

ADH

anti-diuretic hormone

ADR

adverse drug reaction,| acute dystonic reaction

ad lib

as much as needed

AED

antiepileptic drug

AF

atrial fibrillation or afebrile

AFB

acid-fast bacilli

AFP

alpha-fetoprotein

A /G

albumin/globulin ratio

AI

aortic insufficiency

AKA

above the knee amputation

ALD

alcoholic liver disease

ALL

acute lymphocytic leukemia

amb

ambulate

AML

acute myelogenous leukemia

ANA

antinuclear antibody

ANS

autonomic nervous system

AOB

alcohol on breath

AODM

adult onset diabetes mellitus

AP

anteroposterior or abdominal - perineal

ARDS

acute respiratory distress syndrome

ARF

acute renal failure

AS

aortic stenosis

ASAP

as soon as possible

ASCVD

atherosclerotic cardiovascular disease

ASD

atrial septal defect

ASHD

atherosclerotic heart disease

AV

atrioventricular

A-V

arteriovenous

A-VO2

arteriovenous oxygen

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