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• W2040397306 abstract "To compare regional left ventricular (LV) volume curves obtained with real time three-dimensional echocardiography (RT3DE) with two-dimensional circumferential strain curves obtained by MRI in cardiac resynchronization therapy candidates.Several methods using either ultrasound or MRI are used to quantify mechanical dyssynchrony (MD). Theoretically, LV volume and circumferential strain seem related, since both measures are connected to the radius of the ventricle.In 21 patients with chronic heart failure, RT3DE and tagged MRI were performed subsequently. Regional LV volume was computed from the ultrasound images. From the MR images, regional circumferential strain was calculated. Cross-correlations with time lags of 1% of the cardiac cycle were performed to compare the curves in corresponding LV segments. Furthermore, peak septal to lateral (SL) delays were compared between modalities.High correlations were found between the curves (r(2) = 0.65 +/- 0.19), but regional differences in time delay between modalities were observed. In the septum, the volume curve was earlier than the strain curve by 1.8 +/- 17.0 time-lags (n.s.), while in the lateral wall, the volume curve was earlier by 3.3 +/- 12.0 time-lags (P < 0.02). There was a non-significant difference between SL delays in the two modalities (volume: -1.0 +/- 8.6%, strain: 3.0 +/- 12.7%, P = 0.17, a positive sign indicates that the lateral wall is delayed).High correlations were observed between both modalities, but regional differences in time-delay were found. This is possibly inherent to the method of echocardiographic volume calculation and hampers the comparison of both measures for the quantification of MD." @default.
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• W2040397306 date "2008-07-17" @default.
• W2040397306 modified "2023-09-23" @default.
• W2040397306 title "Relation between three-dimensional echocardiography derived left ventricular volume and MRI derived circumferential strain in patients eligible for cardiac resynchronization therapy" @default.
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• W2040397306 doi "https://doi.org/10.1007/s10554-008-9339-8" @default.
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