ARDMS Registered Diagnostic Cardiac Sonographer (RDCS) or ARDMS Registered Vascular Technologist (RVT) or CCI Registered Cardiac Sonographer (RCS) or CCI Registered Vascular Sonographer (RVS). ARDMS Registered Diagnostic Cardiac Sonographer (RDCS) or CCI Registered Cardiac Sonographer (RCS), BLS (American Heart Assoc.).