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Figure 1 | Cardiovascular Ultrasound

Figure 1

From: Relationship between tei index and left ventricular geometric patterns in a hypertensive population: a cross-sectional study

Figure 1

How to calculate Tei Index. TI is defined by the equation ('a'-'b')/'b', where 'a' represents the interval between cessation and onset of mitral inflow, and 'b' represents the ejection time (ET) of the left ventricular outflow. Isovolumic relaxation time (IRT) is measured by subtracting 'd', the interval from the peak of the R wave on the ECG to the end of ejection time, from the interval 'c' between the R wave and the onset of mitral inflow. Isovolumic contraction time (ICT) is obtained by subtracting IRT from 'a'-'b'.

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