title: Cardiac magnetic resonance tissue tracking in right ventricle: Feasibility and normal values.
abstract: To investigate right ventricular (RV) strain in patients without identified cardiac pathology using cardiac magnetic resonance tissue tracking (CMR TT).
  
  
  
  A total of 50 consecutive patients with no identified cardiac pathology were analyzed. RV longitudinal and circumferential strain was assessed by CMR TT. The age range was 4-81years with a median of 32years (interquartile range, 15 to 56years).
  
  
  
  Analysis time per patient was <5min. The peak longitudinal strain (Ell) was -22.11±3.51%. The peak circumferential strains (Ecc) for global, basal, mid-cavity and apical segments were as follows: -11.69±2.25%, -11.00±2.45%, -11.17±3.36%, -12.90±3.34%. There were significant gender differences in peak Eccat the base (P=0.04) and the mid-cavity (P=0.03) with greater deformation in females than in males. On Bland-Altman analysis, peak Ell(mean bias, 0.22±1.67; 95% CI -3.05 to 3.49) and mid-cavity Ecc(mean bias, 0.036±1.75; 95% CI, -3.39 to 3.47) had the best intra-observer agreement and inter-observer agreement, respectively.
  
  
  
  RV longitudinal and circumferential strains can be quickly assessed with good intra-observer and inter-observer variability using TT.
authors.affiliation: The Christ Hospital Health Network, Cincinnati, OH, USA; Pham Ngoc Thach University of Medicine, Ho Chi Minh City, Viet Nam.
authors.forename: Vien T
authors.initials: VT
authors.lastname: Truong
authors.affiliation: The Christ Hospital Health Network, Cincinnati, OH, USA.
authors.forename: Komal S
authors.initials: KS
authors.lastname: Safdar
authors.affiliation: Rush University Medical Center, Chicago, IL, USA.
authors.forename: Dinesh K
authors.initials: DK
authors.lastname: Kalra
authors.affiliation: Circle Cardiovascular Imaging Inc., Calgary, Canada.
authors.forename: Xuexin
authors.initials: X
authors.lastname: Gao
authors.affiliation: The University of Cincinnati, College of Allied Health Sciences, Cincinnati, OH, USA.
authors.forename: Stephanie
authors.initials: S
authors.lastname: Ambach
authors.affiliation: Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA.
authors.forename: Michael D
authors.initials: MD
authors.lastname: Taylor
authors.affiliation: Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA.
authors.forename: Ryan
authors.initials: R
authors.lastname: Moore
authors.affiliation: Centre for Cardiovascular Sciences University of Birmingham, Edgbaston, Birmingham, United Kingdom.
authors.forename: Robin J
authors.initials: RJ
authors.lastname: Taylor
authors.affiliation: Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA.
authors.forename: Joshua
authors.initials: J
authors.lastname: Germann
authors.affiliation: Connecticut Children's Medical Center, Hartford, CT, USA.
authors.forename: Olga
authors.initials: O
authors.lastname: Toro-Salazar
authors.affiliation: Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA.
authors.forename: John L
authors.initials: JL
authors.lastname: Jefferies
authors.affiliation: The Christ Hospital Health Network, Cincinnati, OH, USA.
authors.forename: Cheryl
authors.initials: C
authors.lastname: Bartone
authors.affiliation: The Ohio State University Medical Center, Columbus, OH, USA.
authors.forename: Subha V
authors.initials: SV
authors.lastname: Raman
authors.affiliation: Pham Ngoc Thach University of Medicine, Ho Chi Minh City, Viet Nam.
authors.forename: Tam
authors.initials: T
authors.lastname: Ngo
authors.affiliation: The Christ Hospital Health Network, Cincinnati, OH, USA. Electronic address: mazurw@ohioheart.org.
authors.forename: Wojciech
authors.initials: W
authors.lastname: Mazur
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002648:Child; D002675:Child, Preschool; D005240:Feasibility Studies; D005260:Female; D006352:Heart Ventricles / Q000000981:diagnostic imaging*; D006801:Humans; D009682:Magnetic Resonance Spectroscopy; D008297:Male; D008875:Middle Aged; D015588:Observer Variation; D012016:Reference Values; D015203:Reproducibility of Results; D012189:Retrospective Studies; D055815:Young Adult
keywords: Circumferential strain; Longitudinal strain; Normal values; Reproducibility; Right ventricular strain; Tissue tracking