(H)
hypodermically
Hb or Hgb
hemoglobin
h or hr
hour
hCG
human chlorionic gonadotropin
HCO3
bicarbonate
Hct
hematocrit
HD
hemodialysis
HDL
high-density lipoproteins
Hg
mercury
Hgb
hemoglobin
HGH
human growth hormone
HHNC
hypergycemia hyperosmdar nonketotic coma
HIV
human immunodeficiency virus
HLA
human leukocyte antigen
hPL
human placental lactogen
HR
heart rate
hr.
hour
hs
bedtime, hour of sleep
H2O
Water
HSV
herpes simplex virus
HTN
hypertension
Hx
history
Hz
hertz (cycles/second)
I and O
intake and output