St. Jude Medical is available to help if your heart has trouble catching the beat. The company is a global medical device manufacturer focused on improving the treatment of some of the world's most expensive epidemic diseases. St. Jude Medical operates in one segment producing seven principal product categories: ICD (implantable cardiac defibrillator) systems (the largest category, 28% of earnings), pacemaker systems, atrial fibrillation products, vascular products, structural heart products, Thoratec products, and neuromodulation products. The firm sells its products in more than 100 countries; the US is its largest market. In early 2017, St. Jude Medical was acquired by Abbott Laboratories for $25 billion.