Restless legs syndrome, also known as Willis-Ekbom disease, is a common condition of the nervous system that causes an overwhelming, irresistible urge to move the legs. It can also cause an unpleasant crawling or creeping sensation in the feet, calves and thighs.
Defibrillation is a technique used in emergency medicine to terminate ventricular fibrillation or pulseless ventricular tachycardia. It uses an electrical shock to reset the electrical state of the heart so that it may beat to a rhythm controlled by its own natural pacemaker cells.
A Intermountain Healthcare answered. An implantable cardioverter defibrillator (ICD) is used to treat these heart rhythm problems: 1  Ventricular tachycardia. The ventricles (lower chambers of your heart) send electrical signals too often -- and your heart beats too fast.  Ventricular fibrillation. The ventricles send very fast, irregular signals -- and your heart starts to quiver.