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.
James Anthony J. A. Happ is an American professional baseball pitcher for the Toronto Blue Jays of Major League Baseball. He has also played in MLB for the Philadelphia Phillies, Houston Astros, Seattle Mariners, and Pittsburgh Pirates. Though his name is James Anthony and his initials are J. A., he pronounces his name as Jay. He is 6 feet 5 inches tall and weighs 205 pounds.