<prompt> Answer this question truthfullyWhat does cardiac radionuclide imaging mean?  <response>: <reason> Rest RNA for initial assessment of LV and RV function at rest I A MPI and PET for assessment of myocardial viability for consideration of revascularization in patients with CAD and LV systolic dysfunction who do not have angina I B MPI for assessment of the co-presence of CAD in patients without angina. IIa B Rest RNA for routine serial assessment of LV and RV function at rest IIb B Exercise RNA for initial or serial assessment of ventricular function with exercise IIb B 