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Figure 1 Normal case. Long-axis view of the left ventricle. (A) Electrocardiographic gate indicated that the time phase was end-diastole; there was low ventricular acceleration (blue). (B) Electrocardiographic gate indicated that the phase was early systole. The position of normal onset of ventricular acceleration (arrow, red and yellow area) was within the upper interventricular septum beneath the right coronary cusp.
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