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.
John Locke's kit-cat portrait by Godfrey Kneller, National Portrait Gallery, London. John Locke FRS (/ËlÉk/; 29 August 1632 â 28 October 1704) was an English philosopher and physician, widely regarded as one of the most influential of Enlightenment thinkers and commonly known as the Father of Liberalism.