SUSTAINED RIGHT-VENTRICULAR DYSKINESIS COMPLICATED BY RIGHT-VENTRICULAR INFARCTION

We encountered a 66-yr-old man with acute left inferior and right vent ricular infarction. Tomographic radionuclide ventriculography and Four ier analysis clearly demonstrated reduced wall motion in the inferior walls of both ventricles and markedly delayed phase angles in the infe rior right ventricular segment, indicating dyskinesis, which was confi rmed by two-dimensional echocardiography and contrast right ventriculo graphy. Four years later, right ventricular dyskinesis was still prese nt and corresponded to a right ventricular perfusion defect on Tc-99m- labeled tetrofosmin tomogram. Right ventricular imaging with tomograph ic radionuclide ventriculography with Fourier analysis and Tc-99m-labe led myocardial tomography demonstrates that, even after improved globa l function and hemodynamics, right ventricular dyskinesis related to r ight ventricular perfusion defect can be sustained for several years. Thus, these imaging techniques may contribute to diagnosing right vent ricular infarction and investigating the pathophysiology.