ST. PAUL, Minn.--(BUSINESS WIRE)--St. Jude Medical, Inc. (NYSE:STJ) today announced the U.S. launch of the Reflexion Spiral X™ variable radius mapping catheter at Heart Rhythm 2008. This new catheter will provide physicians with greater maneuverability, stability and control when used in the left atrium for the mapping of abnormal atrial heart arrhythmias, including Atrial Fibrillation (AF).