Equilibrium radionuclide angiocardiography.

Planar equilibrium radionuclide angiography (ERNA) is used to determine global and regional measures of ventricular function (primarily left ventricular [LV] function) at rest and/or during exercise stress or pharmacologic intervention. These measures of ventricular function may include evaluations of ventricular wall motion, ejection fraction (EF), and other parameters of systolic and diastolic function. The following sections provide a technical description of the techniques to acquire and process the data necessary to assess parameters of ventricular performance.