Vien T Truong1, Komal S Safdar2, Dinesh K Kalra3, Xuexin Gao4, Stephanie Ambach5, Michael D Taylor6, Ryan Moore6, Robin J Taylor7, Joshua Germann6, Olga Toro-Salazar8, John L Jefferies6, Cheryl Bartone2, Subha V Raman9, Tam Ngo10, Wojciech Mazur11. 1. The Christ Hospital Health Network, Cincinnati, OH, USA; Pham Ngoc Thach University of Medicine, Ho Chi Minh City, Viet Nam. 2. The Christ Hospital Health Network, Cincinnati, OH, USA. 3. Rush University Medical Center, Chicago, IL, USA. 4. Circle Cardiovascular Imaging Inc., Calgary, Canada. 5. The University of Cincinnati, College of Allied Health Sciences, Cincinnati, OH, USA. 6. Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA. 7. Centre for Cardiovascular Sciences University of Birmingham, Edgbaston, Birmingham, United Kingdom. 8. Connecticut Children's Medical Center, Hartford, CT, USA. 9. The Ohio State University Medical Center, Columbus, OH, USA. 10. Pham Ngoc Thach University of Medicine, Ho Chi Minh City, Viet Nam. 11. The Christ Hospital Health Network, Cincinnati, OH, USA. Electronic address: mazurw@ohioheart.org.
Abstract
PURPOSE: To investigate right ventricular (RV) strain in patients without identified cardiac pathology using cardiac magnetic resonance tissue tracking (CMR TT). METHODS: 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). RESULTS: 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 Ecc at 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. CONCLUSIONS: RV longitudinal and circumferential strains can be quickly assessed with good intra-observer and inter-observer variability using TT.
PURPOSE: To investigate right ventricular (RV) strain in patients without identified cardiac pathology using cardiac magnetic resonance tissue tracking (CMR TT). METHODS: 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). RESULTS: 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 Ecc at 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. CONCLUSIONS: RV longitudinal and circumferential strains can be quickly assessed with good intra-observer and inter-observer variability using TT.
Authors: Vien T Truong; Candice Y Li; Rebeccah L Brown; Ryan A Moore; Victor F Garcia; Eric J Crotty; Michael D Taylor; Tam M N Ngo; Wojciech Mazur Journal: PLoS One Date: 2017-12-11 Impact factor: 3.240
Authors: Boyang Liu; Ahmed M Dardeer; William E Moody; Nicola C Edwards; Lucy E Hudsmith; Richard P Steeds Journal: Int J Cardiol Date: 2017-10-31 Impact factor: 4.164