Additional file 1.

ROI tracking in tissue Doppler imaging. The ROI is tracked (bottom left) as described in the text in the basal segment of the RV. Note the changes in the strain-graph during the tracking. After careful tracking, the ROI follows the myocardial motion.

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Teske et al. Cardiovascular Ultrasound 2007 5:27   doi:10.1186/1476-7120-5-27