AAA
abdominal aortic aneurysm
AB
abortion
ABD
abdominal
*ABG
arterial blood gas
ABX
antibiotics
AC
before meals
ACS
acute coronary syndrome
*A-Fib
atrial fibrillation
AIDS
acquired immunodeficiency syndrome
A/O x 4
alert and oriented x 4 (person, place, time, and event)
ALOC
altered level of consciousness
ALS
advanced life support
AKA
above the knee amputation
AMA
against medical advice
*AMI
acute myocardial infarction
AMS
altered mental status
AOM
acute otitis media
AP
anterior-posterior (as in chest x-ray view)
ASA
aspirin (acetylsalicylic acid)
AV
atrioventricular (block)
BAL
blood alcohol level
BID
2 times a day
Bilat
bilateral
BKA
below the knee amputation