This firm is publicly traded on the OTC Bulletin Board. Information on individual stock prices can be accessed from the symbol, but firms in this category are not part of SBIR Index. Cardiac Control Systems has developed implantable cardiac pacing systems, which consist of single- and dual-chamber pacemakers, electrode leads, and external equipment for programming and monitoring. Pacemakers electrically stimulate the hearts of patients with arrhythmia and other heart conditions, restoring rhythmic contractions and circulation. The company's newest system -- designed to reduce complications -- requires only one electrode lead to be implanted. Cardiac Control sells its systems to hospitals and physicians; it also sells components to original equipment manufacturers.