Most arrhythmias result from problems in the electrical system of the heart. If your arrhythmia is serious, you may need a cardiac pacemaker or an implantable cardioverter defibrillator (ICD). They are devices that are implanted in your chest or abdomen. A pacemaker helps control abnormal heart rhythms. It uses electrical pulses to prompt the heart to beat at a normal rate.
Steven Berlin Johnson (born June 6, 1968) is an American popular science author and media theorist.
J. A. Happ. Happ (born October 19, 1982) is an American professional baseball pitcher for the Toronto Blue Jays of Major League Baseball (MLB). He has also played in MLB for the Philadelphia Phillies, Houston Astros, Seattle Mariners, and Pittsburgh Pirates.