 BioSig Technologies, Inc. NASDAQ:BSGM has announced that physicians at Mayo Clinics campus in Phoenix, Arizona have started using the companys PURE EP System in patient cases treating cardiac arrhythmias. The 30-day clinical evaluation of the PURE EP System is being conducted by the cardiac electrophysiologists Win-Kuang Shen, Hichan El Masry, Arturo Valverde, and Luis Scott. 