1/11/2024 0 Comments Qlab show![]() In TomTec, low and high frame rate strain values differed only in a subset of patients (flattened septum). Quantification smoothness settings in QLAB 10.8 resulted in minimal strain differences. Strain values varied widely between QLAB 10.5 and all other software packages, recommending avoidance of QLAB 10.5 for future studies. Synchrony values varied substantially among all packages in children. Quantification smoothness changes in QLAB 10.8 did not impact strain significantly in any patient group temporal resolution changes in TomTec resulted in strain differences in children with flat ventricular septums, but not those with normal or ventricular paced hearts. Synchrony values varied widely for all strain values ( pā<ā0.001 for both) in all packages. AP4 and SAXM strain values varied significantly between QLAB 10.5 and the other packages. Tracking scores were high for all packages except QLAB 10.5 in the SAXM view. ![]() A mixed-effects linear regression model was used, with main effect considered significant if the p-value was <ā0.05. AP4 and SAXM strain and synchrony values were recorded. Tracking quality for each package was graded. In TomTec, images were analyzed with both low and high frame rates. In QLAB version 10.8, low, medium, and high quantification smoothness settings were employed. We analyzed the same image acquired from the apical 4-chamber (AP4) and short-axis at the mid-papillary level (SAXM) views in both QLAB (versions 10.5 and 10.8) and TomTec (version 1.2). The study population included 108 children patients were divided into three groups: (1) normal cardiac structure and conduction (2) ventricular paced rhythm and (3) flattened ventricular septum (reflecting right ventricular pressure or volume load lesions). To test the hypothesis that different packages may affect results, independent of acquisition, we compared values obtained using two commercially available analysis tool (QLAB and TomTec), with several different settings. ![]() ![]() Strain and synchrony can be calculated from a variety of software packages, but there is a paucity of data with inter-vendor comparisons in children. ![]()
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