St. Jude Medical, Inc. (St. Jude) develops, manufactures and distributes cardiovascular medical devices for the global cardiac rhythm management, cardiology and cardiac surgery and atrial fibrillation therapy areas and neurostimulation medical devices for the management of chronic pain. It operates in four segments: Cardiac Rhythm Management (CRM), Cardiovascular (CV), Atrial Fibrillation (AF) and Neuromodulation (NMD). The Company’s principal products in each operating segment includes tachycardia implantable cardioverter defibrillator systems (ICDs) and bradycardia pacemaker systems (pacemakers) in CRM segment; vascular closure devices, heart valve replacement and repair products and pressure measurement guidewires in CV segment; electrophysiology (EP) introducers and catheters, advanced cardiac mapping, navigation and recording systems and ablation systems in AF segment, and neurostimulation devices in NMD segment. In July 2010, it acquired LightLab Imaging, Inc.