Anne-Laure Castel1, Aymeric Menet2, Pierre-Vladimir Ennezat3, François Delelis1, Caroline Le Goffic1, Camille Binda1, Raphaëlle-Ashley Guerbaai3, Franck Levy4, Pierre Graux1, Christophe Tribouilloy5, Sylvestre Maréchaux6. 1. Université Lille Nord de France, GCS - Groupement des hôpitaux, institut catholique de Lille, faculté libre de médecine, université catholique de Lille, Lille, France. 2. Université Lille Nord de France, GCS - Groupement des hôpitaux, institut catholique de Lille, faculté libre de médecine, université catholique de Lille, Lille, France; Inserm U 1088, université de Picardie, Amiens, France. 3. Centre hospitalier universitaire de Grenoble, Grenoble, France. 4. Centre cardiothoracique, Monaco, France. 5. Inserm U 1088, université de Picardie, Amiens, France; Centre hospitalier universitaire d'Amiens, Amiens, France. 6. Université Lille Nord de France, GCS - Groupement des hôpitaux, institut catholique de Lille, faculté libre de médecine, université catholique de Lille, Lille, France; Inserm U 1088, université de Picardie, Amiens, France. Electronic address: sylvestre.marechaux@yahoo.fr.
Abstract
BACKGROUND: Speckle tracking can be used to measure left ventricular global longitudinal strain (GLS). AIMS: To study the effect of speckle tracking software product upgrades on GLS values and intervendor consistency. METHODS: Subjects (patients or healthy volunteers) underwent systematic echocardiography with equipment from Philips and GE, without a change in their position. Off-line post-processing for GLS assessment was performed with the former and most recent upgrades from these two vendors (Philips QLAB 9.0 and 10.2; GE EchoPAC 12.1 and 13.1.1). GLS was obtained in three myocardial layers with EchoPAC 13.1.1. Intersoftware and intervendor consistency was assessed. Interobserver variability was tested in a subset of patients. RESULTS: Among 73 subjects (65 patients and 8 healthy volunteers), absolute values of GLS were higher with QLAB 10.2 compared with 9.0 (intraclass correlation coefficient [ICC]: 0.88; bias: 2.2%). Agreement between EchoPAC 13.1.1 and 12.1 varied by myocardial layer (13.1.1 only): midwall (ICC: 0.95; bias: -1.1%), endocardium (ICC: 0.93; bias: 1.6%) and epicardial (ICC: 0.80; bias: -3.3%). Although GLS was comparable for QLAB 9.0 versus EchoPAC 12.1 (ICC: 0.95; bias: 0.5%), the agreement was lower between QLAB 10.2 and EchoPAC 13.1.1 endocardial (ICC: 0.91; bias: 1.1%), midwall (ICC: 0.73; bias: 3.9%) and epicardial (ICC: 0.54; bias: 6.0%). Interobserver variability of all software products in a subset of 20 patients was excellent (ICC: 0.97-0.99; bias: -0.8 to 1.0%). CONCLUSION: Upgrades of speckle tracking software may be associated with significant changes in GLS values, which could affect intersoftware and intervendor consistency. This finding has important clinical implications for the longitudinal follow-up of patients with speckle tracking echocardiography.
BACKGROUND: Speckle tracking can be used to measure left ventricular global longitudinal strain (GLS). AIMS: To study the effect of speckle tracking software product upgrades on GLS values and intervendor consistency. METHODS: Subjects (patients or healthy volunteers) underwent systematic echocardiography with equipment from Philips and GE, without a change in their position. Off-line post-processing for GLS assessment was performed with the former and most recent upgrades from these two vendors (Philips QLAB 9.0 and 10.2; GE EchoPAC 12.1 and 13.1.1). GLS was obtained in three myocardial layers with EchoPAC 13.1.1. Intersoftware and intervendor consistency was assessed. Interobserver variability was tested in a subset of patients. RESULTS: Among 73 subjects (65 patients and 8 healthy volunteers), absolute values of GLS were higher with QLAB 10.2 compared with 9.0 (intraclass correlation coefficient [ICC]: 0.88; bias: 2.2%). Agreement between EchoPAC 13.1.1 and 12.1 varied by myocardial layer (13.1.1 only): midwall (ICC: 0.95; bias: -1.1%), endocardium (ICC: 0.93; bias: 1.6%) and epicardial (ICC: 0.80; bias: -3.3%). Although GLS was comparable for QLAB 9.0 versus EchoPAC 12.1 (ICC: 0.95; bias: 0.5%), the agreement was lower between QLAB 10.2 and EchoPAC 13.1.1 endocardial (ICC: 0.91; bias: 1.1%), midwall (ICC: 0.73; bias: 3.9%) and epicardial (ICC: 0.54; bias: 6.0%). Interobserver variability of all software products in a subset of 20 patients was excellent (ICC: 0.97-0.99; bias: -0.8 to 1.0%). CONCLUSION: Upgrades of speckle tracking software may be associated with significant changes in GLS values, which could affect intersoftware and intervendor consistency. This finding has important clinical implications for the longitudinal follow-up of patients with speckle tracking echocardiography.
Authors: Patrik Johansson Blixt; Michelle S Chew; Rasmus Åhman; Lina de Geer; Lill Blomqwist; Meriam Åström Aneq; Jan Engvall; Henrik Andersson Journal: Ann Intensive Care Date: 2021-03-30 Impact factor: 6.925
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