An implantable cardioverter defibrillator (ICD) is a small device that is implanted in the chest and uses electrical shocks to control arrhythmias, which are abnormal heart rhythms. Arrhythmias can be caused by many factors, including stress and anger. This study will evaluate the use of a stress reduction treatment (SRT) program aimed at reducing the occurrence of arrhythmias that require treatment with an ICD shock.