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Figure 4 :Measurement of isovolumetric relaxation time Sm is Systolic, Em is early diastolic, and Am is late diastolic tissue Doppler wave. IVRT is calculated by subtracting the time period d (beginning of QRS complex till end of the Sm wave) from time period c (beginning of QRS complex till beginning of the Em wave)

Figure 4 :Measurement of isovolumetric relaxation time Sm is Systolic, Em is early diastolic, and Am is late diastolic tissue Doppler wave. IVRT is calculated by subtracting the time period d (beginning of QRS complex till end of the Sm wave) from time period c (beginning of QRS complex till beginning of the Em wave)