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Pulsed-wave Doppler at the tricuspid level of the right ventricular free wall in a normal individual (A) and in a patient with pulmonary hypertension (B). MPI, myocardial performance index; IVRT, isovolumic relaxation time; IVCT, isovolumic contraction time; Ejct, ejection time; St, peak systolic velocity at the tricuspid valve; Et, peak early filling velocity at the tricuspid ring; At, peak late filling (atrial) velocity at the tricuspid ring.