BACKGROUND: We previously found that a 2-dimensional (2D) strain echocardiography method had some limitations in the assessment of low magnitudes and rates of deformation. Here, we study whether a recently introduced high spatial resolution speckle tracking (HRT) method improves accuracy of 2D strain measurements. METHODS: A gelatin block was cyclically compressed by a hydraulic piston. Regional deformations measured by 2D-HRT were compared with reference strains obtained from an embedded pair of sonomicrometry crystals. Global deformations (along the gelatin block) were compared to strains calculated from tracings of piston motion. We tested a wide range of strains (5.4%-21.5%) and combined each measurement with simulated heart rates (24-196/min). RESULTS: Regional deformations measured by 2D-HRT demonstrated excellent correlation (r = 0.99, P < .0001) and agreement (bias +/- 2SD = -0.3 +/- 1.3%) with sonomicrometry. Close correlation (r = 0.99, P < .0001) and agreement (bias +/- 2SD = 0.5 +/- 1.2%) was observed also for global strains measured by 2D-HRT and compared with tracings of piston motion. There was good reproducibility of all tests: interobserver and intraobserver variabilities were 3.2% and 3.4% for regional strains and 3.1% and 3.5% for global strains, respectively. CONCLUSION: In our in vitro setting, the 2D-HRT method produced precise and accurate measurements of strains for clinically relevant ranges of deformation magnitudes and ranges.
BACKGROUND: We previously found that a 2-dimensional (2D) strain echocardiography method had some limitations in the assessment of low magnitudes and rates of deformation. Here, we study whether a recently introduced high spatial resolution speckle tracking (HRT) method improves accuracy of 2D strain measurements. METHODS: A gelatin block was cyclically compressed by a hydraulic piston. Regional deformations measured by 2D-HRT were compared with reference strains obtained from an embedded pair of sonomicrometry crystals. Global deformations (along the gelatin block) were compared to strains calculated from tracings of piston motion. We tested a wide range of strains (5.4%-21.5%) and combined each measurement with simulated heart rates (24-196/min). RESULTS: Regional deformations measured by 2D-HRT demonstrated excellent correlation (r = 0.99, P < .0001) and agreement (bias +/- 2SD = -0.3 +/- 1.3%) with sonomicrometry. Close correlation (r = 0.99, P < .0001) and agreement (bias +/- 2SD = 0.5 +/- 1.2%) was observed also for global strains measured by 2D-HRT and compared with tracings of piston motion. There was good reproducibility of all tests: interobserver and intraobserver variabilities were 3.2% and 3.4% for regional strains and 3.1% and 3.5% for global strains, respectively. CONCLUSION: In our in vitro setting, the 2D-HRT method produced precise and accurate measurements of strains for clinically relevant ranges of deformation magnitudes and ranges.
Authors: Fernando L Martin; Paul M McKie; Alessandro Cataliotti; S Jeson Sangaralingham; Josef Korinek; Brenda K Huntley; Elise A Oehler; Gerald E Harders; Tomoko Ichiki; Sarah Mangiafico; Karl A Nath; Margaret M Redfield; Horng H Chen; John C Burnett Journal: Am J Physiol Regul Integr Comp Physiol Date: 2011-11-09 Impact factor: 3.619
Authors: Juan Carlos Plana; Maurizio Galderisi; Ana Barac; Michael S Ewer; Bonnie Ky; Marielle Scherrer-Crosbie; Javier Ganame; Igal A Sebag; Deborah A Agler; Luigi P Badano; Jose Banchs; Daniela Cardinale; Joseph Carver; Manuel Cerqueira; Jeanne M DeCara; Thor Edvardsen; Scott D Flamm; Thomas Force; Brian P Griffin; Guy Jerusalem; Jennifer E Liu; Andreia Magalhães; Thomas Marwick; Liza Y Sanchez; Rosa Sicari; Hector R Villarraga; Patrizio Lancellotti Journal: Eur Heart J Cardiovasc Imaging Date: 2014-10 Impact factor: 6.875
Authors: Giuseppe Caracciolo; Mackram F Eleid; Haruhiko Abe; Nisha Bhatia; F David Fortuin; Susan Wilansky; Scipione Carerj; Partho P Sengupta Journal: Cardiovasc Ultrasound Date: 2010-08-03 Impact factor: 2.062
Authors: Frank G Aguilar; Senthil Selvaraj; Eva E Martinez; Daniel H Katz; Lauren Beussink; Kwang-Youn A Kim; Jie Ping; Laura Rasmussen-Torvik; Amita Goyal; Jin Sha; Marguerite R Irvin; Donna K Arnett; Sanjiv J Shah Journal: Echocardiography Date: 2015-11-03 Impact factor: 1.724