[ R ]

• RSIL  respiratory and systemic infection laboratory
• R-SIRS  Revised Seriousness of Illness Rating Scale
• RSIVP  rapid-sequence intravenous pyelography
• RSK  ribosomal S6 kinase
• RSL  right sacrolateral [fetal position]
• RSLD  repair of sublethal damage
• RSLT  test result [UMLS]
• RSM  risk screening model; Royal Society of Medicine
• RSMR  relative standard mortality rate
• RSN  restin; right substantia nigra
• RSNA  Radiological Society of North America; renal sympathetic nerve activity
• RSO  radiation safety officer; Resident Surgical Officer; right superior oblique [muscle]
• rSO₂  regional oxygen saturation
• RSP  rapid straight pacing; rat serum protein; recurrent spontaneous pneumothorax; removable silicone plug; respirable suspended particulate; ribose-5-phosphatase; right sacroposterior [fetal position]
• RSPAC  remote sensing public access center
• RSPCA  Royal Society for the Prevention of Cruelty to Animals
• RS-PCR  ribonucleic acid [RNA] specific template polymerase chain reaction
• RS₃PE  remitting seronegative symmetrical synovitis with pitting edema
• RSPH  Royal Society for the Promotion of Health
• RSPK  recurrent spontaneous psychokinesis
• RSPV  right superior pulmonary vein
• RSR  rectosphincteric reflex response-stimulus ratio; regular sinus rhythm; relative survival rate; right superior rectus [muscle]
• rSr  an electrocardiographic complex
• RSS  rat stomach strip; recombination signal sequence; rectosigmoidoscopy; repetitive stress syndrome; rotary subluxation of the sphenoid; Russell-Silver syndrome; Russian spring-summer [encephalitis]
• RSSE  Russian spring-summer encephalitis
• RSSI  received signal strength indication
• RSSR  relative slow sinus rate
• RST  radiosensitivity test; rapid surfactant test; reagin screen test; repeated significance test; right sacrotransverse [fetal position]; rubrospinal tract
• R_st  in paper or thin layer chromatography, the distance that a spot of a substance has moved, relative to a reference standard spot
• RSTD  rectal-skin temperature difference
• R-step  restoration step
• rSTERN  recurrent spatiotemporal neuron
• RSTI  Radiological Service Training Institute
• RSTL  relaxed skin tension lines
• RSTMH  Royal Society of Tropical Medicine and Hygiene
• RSTS  retropharyngeal soft tissue space; Rubinstein-Taybi syndrome
• RSTV  Rost Island virus
• RSU  radiological sciences unit
• RSV  regurgitant stroke volume; respiratory syncytial virus; right subclavian vein; Rous sarcoma virus
• RSVC  right superior vena cava
• RSVP  rejuvenation with sparing of vascular perforators; retired senior volunteer program
• RSV-Pr-C  Rous sarcoma virus (Prague C)
• RSV-SR-D  Rous sarcoma virus (Schmidt-Ruppin D)
• RSV-SR-B  Rous sarcoma virus (Schmidt-Ruppin B)
• RT  rabbit trachea; radiologic technologist; radiotelemetry; radiotherapy; random transfusion; radium therapy; rapid tranquilization; rational therapy; reaction time; reading test; real time; reciprocating tachycardia; recovery time; recreational therapy; rectal temperature; red tetrazolium; red-top; reduction time; reference terminology; Registered Technician; related term [UMLS]; relaxation time; renal transplantation; repetition time; [heart] repolarization time; resistance transfer; respiratory therapist/therapy; response time; rest tremor; retransformation; retrieved term; reverse transcriptase; reverse transcription; right; right thigh; robust take; room temperature; Rubinstein-Taybi [syndrome]
• RT3, rT₃  reverse triiodothyronine
• RT₉₀  time to 90% relaxation
• Rt  right; total resistance
• rT  recurrent tumor [TNM (tumor-node-metastasis) classification]; ribothymidine
• rt  right; room temperature
• RTA  ray tracing algorithm; renal tubular acidosis; reverse transcriptase assay; road traffic accident
• RTAD  renal tubular acidification defect
• rTag  recombinant small T-antigen
• rTAP  recombinant tick anticoagulant peptide
• RT(ARRT)  Radiologic Technologist certified by the American Registry of Radiologic Technologists
• RTAS  radiology telephone access system
• RTC  rape treatment center; regional tuberculosis center; renal tubular cell; residential treatment center; return to clinic; reverse thrust catheter
• rtc  return to clinic
• RTCL  Radiotherapy Command Language
• rTCMS  repetitive transcranial magnetic stimulation
• RT-CT  radiotherapy dedicated computed tomography
• RTD  real time 3-dimensional [ultrasound]; renal tubular dysplasia or dysgenesis defect; resonant tunneling device; routine test dilution
• Rtd  retarded
• RTE  Registry of Toxic Effects
• RTEC  Regional Technology and Education Consortium
• RTECS  Registry of Toxic Effects of Chemical Substances [NLM database]
• RTF  resistance transfer factor; respiratory tract fluid; rich text format
• RTG  radioactive thermal generator; renal threshold of glucose
• RTG-2  rainbow trout gonadal tissue cells
• RTH  resistance to thyroid hormone
• RTI  reproductive tract infection; respiratory tract infection; retrograde tracheal intubation; reverse transcriptase inhibition
• RTK  receptor-tyrosine kinase; rhabdoid tumor of the kidney
• rtl  rectal
• rt lat  right lateral
• RTM  registered trademark
• rTMS  repetitive transcranial magnetic stimulation
• RTN  renal tubular necrosis
• RTn  reverse transcription intermediate
• RT(N)(ARRT)  Radiologic Technologist (Nuclear Medicine) certified by the American Registry of Radiologic Technologists
• RTNet  radiotherapy networking system
• rTNF  recombinant tumor necrosis factor
• RTO  return to office; right toeoff
• RTOG  radiation therapy oncology group
• RTP  radiation treatment planning; radiotherapy treatment planning; renal transplantation patient; reverse transcriptase-producing [agent]
• rTPA, rtPA, rt-PA  recombinant tissue plasminogen activator
• RT-PACS  radiotherapy picture archival and communication system
• RT-PCR  reverse transcriptase polymerase chain reaction [PCR]
• RTPV  radiation therapy planning and verification; RT parvovirus
• RTR  Recreational Therapist, Registered; red blood cell turnover rate; retention time ratio
• RT(R)(ARRT)  Registered Technologist (Radiography) certified by the American Registry of Radiologic Technologists
• RT-RH  reverse transcriptase-ribonuclease H
• RTRR  return to recovery room
• RTS  rapid throughput screening; real time scan; Rett syndrome; Revised Trauma Score; right toestrike; Rothmund-Thomson syndrome; Rubinstein-Taybi syndrome
• RTSS  rest technetium-99m sestamibi scan
• RTT  round trip time
• RT(T)(ARRT)  Radiologic Technologist (Radiation Therapy) certified by the American Registry of Radiologic Technologists
• RTTP  radiation therapy treatment planning
• RTU  real-time ultrasonography; relative time unit; renal transplantation unit
• RT₃U  resin triiodothyronine uptake
• RTUI  respiratory therapy utilization index
• RTV  resistance-to-voltage [converter]; rhinotracheitis virus; room temperature vulcanization
• RTW  return to work
• RTX  robustotoxin
• RU  radioulnar; rat unit; reading unit; residual urine; resin uptake; resistance unit; retrograde urogram; right upper; roentgen unit
• ru  radiation unit
• RU-1  human embryonic lung fibroblasts
• RU-486  mifepristone
• RUA  reduced under anesthesia
• RUBV  rubella virus
• RUC  rapid update cycle
• RUD  recurrent ulcer of the duodenal bulb; repeating unit domain
• RUE  right upper extremity
• RUG  resource utilization group; retrograde urethrography
• RUL  right upper eyelid; right upper lateral; right upper limb; right upper lobe
• RuMP  ribulose monophosphate pathway
• RUOQ  right upper outer quadrant
• RUP  right upper pole
• Ru1,5P  ribulose-1,5-biphosphate
• Ru5P  ribulose-5-phosphate
• rupt  ruptured
• RUPV  right upper pulmonary vein
• RUQ  right upper quadrant
• RUR  resin-uptake ratio
• RURTI  recurrent upper respiratory tract infection
• RUS  radioulnar synostosis; real-time ultrasonography
• RUSB  right upper sternal border
• RUSP  right ventricular systolic pressure
• RUT  rapid urease test
• RUTH  Raloxifene Use for the Heart [study]
• RUV  residual urine volume
• RUX  right upper extremity
• RUZ  right upper zone
• RV  ranavirus; random variable; rat virus; Rauscher virus; rectovaginal; regurgitant [stroke] volume; reinforcement value; renal vein; reovirus; residual volume; respiratory volume; retroventral; retroversion; retrovesical; retrovirus; return visit; rhabdovirus; rheumatoid vasculitis; rhinovirus; right ventricle, right ventricular; rotavirus; rubella vaccine; rubella virus; Russell viper
• R/V, R&V  record and verify
• R_V  radius of view
• Rv  venous resistance
• RVA  rabies vaccine activated; recombinant virus assay; re-entrant ventricular arrhythmia; right ventricle activation; right ventricular apex; right vertebral artery
• RV-A  Rotavirus A
• RVAD  right ventricular assist device
• RVAW  right ventricle anterior wall
• RVB  red venous blood
• RV-B  Rotavirus B
• RVBF  reversed vertebral blood flow
• RVC  reason for visit classification; rectovaginal constriction
• RV-C  Rotavirus C
• RVD  regulatory [fluid] volume decrease; relative vertebral density; relative vessel diameter; relative volume decrease; right ventricular dimension; right ventricular dysplasia
• RV-D  Rotavirus D
• RVDC  right ventricular diastolic collapse
• RVDO  right ventricular diastolic overload
• RVDV  right ventricular diastolic volume
• RVE  right ventricular enlargement
• RV-E  Rotavirus E
• RVECP  right ventricular endocardial potential
• RVED  right ventricular end-diastolic [pressure]
• RVEDD  right ventricular end-diastolic diameter
• RVEDP  right ventricular end-diastolic pressure
• RVEDV  right ventricular end-diastolic volume
• RVEDVI  right ventricular end-diastolic volume index
• RVEF  right ventricular ejection fraction; right ventricular end-flow
• RVESV  right ventricular end-systolic volume
• RVET  right ventricular ejection time
• RVF  renal vascular failure; residual volume fraction; Rift Valley fever; right ventricular failure; right visual field
• RV-F  Rotavirus F
• RVFP  right ventricular filling pressure
• RVFV  Rift Valley fever virus
• RVG  right ventral gluteus [muscle]; right visceral ganglion; radionuclide ventriculography
• RV-G  Rotavirus G
• RVH  renal vascular hypertension, renovascular hypertension; right ventricular hypertrophy
• RVHD  rheumatic valvular heart disease
• RVHR  renovascular hypertensive rat
• RVI  relative value index; right ventricle infarction
• RVID  right ventricular internal dimension
• RVIT  right ventricular inflow tract
• RV-IVRT  right ventricular isovolumic relaxation time
• RVL  right vastus lateralis
• RVLG  right ventrolateral gluteal
• RVLM  rostral ventrolateral medulla
• RVM  right ventricular mass; right ventricular mean
• RVMM  rostral ventromedial medulla
• RVO  Regional Veterinary Officer; relaxed vaginal outlet; right ventricular outflow
• RVOT  right ventricular outflow tract
• RVP  red veterinary petrolatum; resting venous pressure; right ventricular pressure
• RVPEP  right ventricular pre-ejection period
• RVPFR  right ventricular peak filling rate
• RVP/LVP  right ventricular pressure/left ventricular pressure [ratio]
• RVPRA  renal vein plasma renin activity
• RVR  reduced vascular response; renal vascular resistance; repetitive ventricular response; resistance to venous return
• RVRA  renal vein renin activity, renal venous renin assay
• RVRC  renal vein renin concentration
• RVS  rectovaginal space; relative value scale/study; reported visual sensation; retrovaginal space
• RVSO  right ventricular stroke output
• RVSV  right ventricular stroke volume
• RVSW  right ventricular stroke work
• RVSWI  right ventricular stroke work index
• RVT  renal vein thrombosis
• RVTE  recurring venous thromboembolism
• RV/TLC  residual volume/total lung capacity
• RVU  relative value unit
• RVV  right ventricular volume; rubella vaccine-like virus; Russell viper venom
• rVV  recombinant vaccinia virus
• RVVO  right ventricular volume overload
• RVVT  Russell viper venom time
• RVW  right ventricular wall
• RVWT  right ventricle wall thickness
• RW  radiological warfare; ragweed; respiratory work; Romano-Ward [syndrome]; round window
• R-W  Rideal-Walker [coefficient]; Romano-Ward [syndrome]
• R/W  return to work
• RWAGE  ragweed antigen E
• RWC  receiving water concentration; regional weaning center
• RWIS  restraint and water immersion stress
• RWJF  Robert Wood Johnson Foundation
• RWM  regional wall motion
• RWMA  regional wall motion abnormality
• RWP  ragweed pollen; R-wave progression
• RWS  radiology work station; ragweed sensitivity
• RWT  random walk theory [fluorescent imaging]; relative wall thickness
• RWV  rotating-wall vessel
• RX  rapid exchange; reaction; residual tumor not assessed [TNM (tumor-node-metastasis) classification]
• Rx  drug; medication; pharmacy; prescribe, prescription, prescription drug; take [Lat. recipe]; therapy; treatment
• RXLI  recessive X-linked ichthyosis
• RXN  reaction
• RXR  retinoid X receptor
• RXRA  retinoid X receptor alpha
• RXRE  retinoic X response element
• RXRG  retinoid X receptor gamma
• RXT  right exotropia
• R-Y  Roux-en-Y [anastomosis]
• RYD  ryanodine
• RYR, Ryr  ryanodine receptor
  

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