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Figure 2: Line diagram depicting the measurements of preejection period and left ventricular ejection time from tissue Doppler imaging. STI: Systolic time interval; A': Late diastolic wave; E': Early diastolic wave; S: Systolic wave (adapted from: Cui, Wei and Roberson, David and Chen, Zhen and Madronero, Luisa and Cuneo, Bettina (2008). Systolic and Diastolic Time Intervals Measured from Doppler Tissue Imaging: Normal Values and Z-score Tables, and Effects of Age, Heart Rate, and Body Surface Area. Journal of the American Society of Echocardiography: official publication of the American Society of Echocardiography. 21. 361-70. 10.1016/j.echo. 2007.05.034)

Figure 2:  Line diagram depicting the measurements of preejection period and left ventricular ejection time from tissue Doppler imaging. STI: Systolic time interval; A': Late diastolic wave; E': Early diastolic wave; S: Systolic wave (adapted from: Cui, Wei and Roberson, David and Chen, Zhen and Madronero, Luisa and Cuneo, Bettina (2008). Systolic and Diastolic Time Intervals Measured from Doppler Tissue Imaging: Normal Values and Z-score Tables, and Effects of Age, Heart Rate, and Body Surface Area. <i>Journal of the American Society of Echocardiography</i>: official publication of the American Society of Echocardiography. 21. 361-70. 10.1016/j.echo. 2007.05.034)