I had several tests on my heart , Myocardial perfusion imaging, SPECT, including attenuation correction, qualitative or quantitiative wall motion, ejection fracton by first pass or ghated techniquel, multipule studies. The Doc has said the test left concerns. they would like to do a caterization . What are they looking for and how can I find out which hospital is safest to go to. In St Petersburg ,Fl