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FIGURE 2: Doppler tissue imaging of the basal portion of the right
ventricular free wall. (A) Normal control,
B) Chagasic patient showing delayed isovolumic
relaxation time. S´: Systolic myocardial wave;
E´: early diastolic myocardial wave;
a´: late diastolic myocardial wave;
IRT: isovolumic relaxation time.