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.
Boston, Suffolk County, Massachusetts, United States (1971 â present) Mark Robert Michael Wahlberg (born June 5, 1971) is an Academy Award-nominated, BAFTA-winning American actor, rapper and producer of film and television.