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.
Steven Biko dies. Steven Biko, leader of South Africaâs âBlack Consciousness Movement,â dies of severe head trauma on the stone floor of a prison cell in Pretoria. Six days earlier, he had suffered a major blow to his skull during a police interrogation in Port Elizabeth.