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.
Kam Williams. Kam Williams (born December 11, 1952) is an African-American journalist, largely known for his work as a film critic, celebrity interviewer and literary critic.