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 - perineAAA = 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 oxygeal
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