MEDICAL ABBREVIATIONS AND SYMBOLS (CONT)
RA
rheumatoid arthritis
Ra
radium
RAIU
radioactive iodine uptake
RAP
right atrial pressure
RAS
reticular activating system
RBBB
right bundle branch block
RBC
red blood cells or corpuscles
RD
respiratory disease; retinal detachment
RDS
respiratory distress syndrome
rehab
rehabilitation
RES
reticuloendothelial system
RHD
rheumatic heart disease
RHF
right heart failure
RN
Registered Nurse
RNA
ribonucleic acid
RO
routine order
R/O
rule out
ROM
range of motion
ROS
review of systems
RR
recovery room
R&R
rate and rhythm
RT
reaction time
RTC
return to clinic
RUE
right upper extremity
RUQ
right upper quadrant
S
left
S-1 to S-5
sacral vertebrae or nerves
S-A; SA node
sino-atrial node
MD0010
C-14