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Figure 4: Longitudinal strain rate analysis averaged from the various myocardial segments in a mid-esophageal-4C view, to determine the strain (diastolic strain rate) at peak mitral filling (E) and isovolumic relaxation time. The duration from R wave (in the electrocardiograph) to peak E of mitral inflow is 602 ms (0.6 s). The red line denotes strain at E; yellow line denotes strain at isovolumic relaxation time measured at 420 ms (average of 300 and 543 ms) and aortic valve closure. E = 48 cm/s, Dsr at E = 1.0/s; E/10 Dsr at E = 48/10 × 1 = 4.8. E = 48 cm/s, Dsr at IVRT = 0.3/s; E/10 Dsr at IVRT = 48/10 × 0.3 = 16. Dsr: Diastolic strain rate, IVRT: Isovolumic relaxation time

Figure 4: Longitudinal strain rate analysis averaged from the various myocardial segments in a mid-esophageal-4C view, to determine the strain (diastolic strain rate) at peak mitral filling (E) and isovolumic relaxation time. The duration from R wave (in the electrocardiograph) to peak E of mitral inflow is 602 ms (0.6 s). The red line denotes strain at E; yellow line denotes strain at isovolumic relaxation time measured at 420 ms (average of 300 and 543 ms) and aortic valve closure. E = 48 cm/s, Dsr at E = 1.0/s; E/10 Dsr at E = 48/10 × 1 = 4.8. E = 48 cm/s, Dsr at IVRT = 0.3/s; E/10 Dsr at IVRT = 48/10 × 0.3 = 16. Dsr: Diastolic strain rate, IVRT: Isovolumic relaxation time