BACKGROUND: The use of speckle-tracking echocardiography for evaluation of cardiac function has great applicability in different scenarios. The broad use of this method requires tools that allow the extraction of relevant data from strain curves and inclusion of these data in traditionally used parameters. OBJECTIVES: The present study aimed to present and validate a free software, called D-station, for analysis of strain curves. METHODS: From raw data files, the D-Station determines the phases of the cardiac cycle, and simultaneously exhibits the strain and strain rate curves of different cardiac chambers. Validation of the software was done by global longitudinal strain (GLS), and the analyses were performed: 1) graphical comparison of EchoPAC and D-Station paired measurements in relation to equality line; 2) by coefficient of correlation of these measurements; 3) test of hypothesis (p > 0.05); and 4) Bland-Altman analysis. RESULTS: The Spearman's rho correlation coefficient indicated a strong correlation between the measurements. Results of the test of hypothesis showed a p-value = 0.6798 >> 0.05, thus also indicating an equivalence between the softwares. The Bland-Altman analysis revealed a bias ≤ 1% and dispersion ≤ 2% between the measurements. The tests showed that, for GLS values lower than 10%, there was a trend for higher percentage difference between the values, although the absolute values remained low. CONCLUSION: The D-Station software was validated as an additional tool to the EchoPAC, which uses the raw data from the strain and strain rate curves exported from a proprietary software. (Arq Bras Cardiol. 2020; 114(3):496-506).
BACKGROUND: The use of speckle-tracking echocardiography for evaluation of cardiac function has great applicability in different scenarios. The broad use of this method requires tools that allow the extraction of relevant data from strain curves and inclusion of these data in traditionally used parameters. OBJECTIVES: The present study aimed to present and validate a free software, called D-station, for analysis of strain curves. METHODS: From raw data files, the D-Station determines the phases of the cardiac cycle, and simultaneously exhibits the strain and strain rate curves of different cardiac chambers. Validation of the software was done by global longitudinal strain (GLS), and the analyses were performed: 1) graphical comparison of EchoPAC and D-Station paired measurements in relation to equality line; 2) by coefficient of correlation of these measurements; 3) test of hypothesis (p > 0.05); and 4) Bland-Altman analysis. RESULTS: The Spearman's rho correlation coefficient indicated a strong correlation between the measurements. Results of the test of hypothesis showed a p-value = 0.6798 >> 0.05, thus also indicating an equivalence between the softwares. The Bland-Altman analysis revealed a bias ≤ 1% and dispersion ≤ 2% between the measurements. The tests showed that, for GLS values lower than 10%, there was a trend for higher percentage difference between the values, although the absolute values remained low. CONCLUSION: The D-Station software was validated as an additional tool to the EchoPAC, which uses the raw data from the strain and strain rate curves exported from a proprietary software. (Arq Bras Cardiol. 2020; 114(3):496-506).
Authors: Jens-Uwe Voigt; Gianni Pedrizzetti; Peter Lysyansky; Tom H Marwick; Helen Houle; Rolf Baumann; Stefano Pedri; Yasuhiro Ito; Yasuhiko Abe; Stephen Metz; Joo Hyun Song; Jamie Hamilton; Partho P Sengupta; Theodore J Kolias; Jan d'Hooge; Gerard P Aurigemma; James D Thomas; Luigi Paolo Badano Journal: Eur Heart J Cardiovasc Imaging Date: 2014-12-18 Impact factor: 6.875
Authors: John Aalen; Petter Storsten; Espen W Remme; Per A Sirnes; Ola Gjesdal; Camilla K Larsen; Erik Kongsgaard; Espen Boe; Helge Skulstad; Jonny Hisdal; Otto A Smiseth Journal: JACC Cardiovasc Imaging Date: 2018-01-17
Authors: Philippe Joos; Jonathan Poree; Herve Liebgott; Didier Vray; Mathilde Baudet; Julia Faurie; Francois Tournoux; Guy Cloutier; Barbara Nicolas; Damien Garcia; Mathilde Baudet; Francois Tournoux; Philippe Joos; Jonathan Poree; Guy Cloutier; Herve Liebgott; Julia Faurie; Didier Vray; Barbara Nicolas; Damien Garcia Journal: IEEE Trans Ultrason Ferroelectr Freq Control Date: 2018-05 Impact factor: 2.725
Authors: Oana Mirea; Efstathios D Pagourelias; Jurgen Duchenne; Jan Bogaert; James D Thomas; Luigi P Badano; Jens-Uwe Voigt Journal: JACC Cardiovasc Imaging Date: 2017-05-17