before
a (with a line on top)
A/A
awake/ alert
AAA
abdominal aortic aneurysm
AAOX3
awake alert oriented x 3
abd
abdomen
ABG
arterial blood gas
ABN
abnormalities/ abnormal
ABX
antibiotics
ac
before meals
ACEI
ace inhibitor
ADH
anti diuretic hormone
ADL
activities of daily living
ad lib
as desired
ADM
admission
AEB
as evidenced by
Afib or a.fib
atrial fibrillation
afeb
afebrile
means not feverish
A flutter or a. flutter
atrial flutter
AH
auditory hallucinations
AI
aortic insufficiency
AICD
automatic internal cardiac defibrillator
AIDS
acquired immune deficiency syndrome
ALL
acute lympohocytic leukemia
ALS
amyotropic lateral sclerosis