Accuracy of speckle tracking in the context of stress echocardiography in short axis view: An in vitro validation study
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{"title"=>"Accuracy of speckle tracking in the context of stress echocardiography in short axis view: An in vitro validation study", "type"=>"journal", "authors"=>[{"first_name"=>"Amir", "last_name"=>"Hodzic", "scopus_author_id"=>"56881697200"}, {"first_name"=>"Boris", "last_name"=>"Chayer", "scopus_author_id"=>"23024222100"}, {"first_name"=>"Diya", "last_name"=>"Wang", "scopus_author_id"=>"57200088572"}, {"first_name"=>"Jonathan", "last_name"=>"Porée", "scopus_author_id"=>"36085289200"}, {"first_name"=>"Guy", "last_name"=>"Cloutier", "scopus_author_id"=>"7004451628"}, {"first_name"=>"Paul", "last_name"=>"Milliez", "scopus_author_id"=>"57200501755"}, {"first_name"=>"Hervé", "last_name"=>"Normand", "scopus_author_id"=>"57201374097"}, {"first_name"=>"Damien", "last_name"=>"Garcia", "scopus_author_id"=>"7202747971"}, {"first_name"=>"Eric", "last_name"=>"Saloux", "scopus_author_id"=>"6603539534"}, {"first_name"=>"Francois", "last_name"=>"Tournoux", "scopus_author_id"=>"55911520500"}], "year"=>2018, "source"=>"PLoS ONE", "identifiers"=>{"scopus"=>"2-s2.0-85044531889", "doi"=>"10.1371/journal.pone.0193805", "sgr"=>"85044531889", "isbn"=>"1111111111", "pmid"=>"29584751", "issn"=>"19326203", "pui"=>"621396050"}, "id"=>"099a0793-a5d3-36a8-8da7-e4e33d6bf563", "abstract"=>"AIM: This study aimed to test the accuracy of a speckle tracking algorithm to assess myocardial deformation in a large range of heart rates and strain magnitudes compared to sonomicrometry. METHODS AND RESULTS: Using a tissue-mimicking phantom with cyclic radial deformation, radial strain derived from speckle tracking (RS-SpT) of the upper segment was assessed in short axis view by conventional echocardiography (Vivid q, GE) and post-processed with clinical software (EchoPAC, GE). RS-SpT was compared with radial strain measured simultaneously by sonomicrometers (RS-SN). Radial strain was assessed with increasing deformation rates (60 to 160 beats/min) and increasing pulsed volumes (50 to 100 ml/beat) to simulate physiological changes occurring during stress echocardiography. There was a significant correlation (R2 = 0.978, P <0.001) and a close agreement (bias +/- 2SD, 0.39 +/- 1.5%) between RS-SpT and RS-SN. For low strain values (<15%), speckle tracking showed a small but significant overestimation of radial strain compared to sonomicrometers. Two-way analysis of variance did not show any significant effect of the deformation rate. For RS-SpT, the feasibility was excellent and the intra- and inter-observer variability were low (the intraclass correlation coefficients were 0.96 and 0.97, respectively). CONCLUSIONS: Speckle tracking demonstrated a good correlation with sonomicrometry for the assessment of radial strain independently of the heart rate and strain magnitude in a physiological range of values. Though speckle tracking seems to be a reliable and reproducible technique to assess myocardial deformation variations during stress echocardiography, further studies are mandated to analyze the impact of angulated and artefactual out-of-plane motions and inter-vendor variability.", "link"=>"http://www.mendeley.com/research/accuracy-speckle-tracking-context-stress-echocardiography-short-axis-view-vitro-validation-study", "reader_count"=>4, "reader_count_by_academic_status"=>{"Unspecified"=>1, "Other"=>1, "Professor"=>1, "Student > Ph. D. Student"=>1}, "reader_count_by_user_role"=>{"Unspecified"=>1, "Other"=>1, "Professor"=>1, "Student > Ph. D. Student"=>1}, "reader_count_by_subject_area"=>{"Unspecified"=>2, "Medicine and Dentistry"=>2}, "reader_count_by_subdiscipline"=>{"Medicine and Dentistry"=>{"Medicine and Dentistry"=>2}, "Unspecified"=>{"Unspecified"=>2}}, "group_count"=>0}

Scopus | Further Information

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