anti-arrhythmiaagents arrhythmia arrhythmias artificial cardiac cardiacpacing cardiology cardiovascular complications congresses control death defibrillators diagnosis diastole diastole(cardiaccycle) diseases drugevaluation drugtherapy etiology fitness health heart heartdiseases heartfailure implantable implantablecardioverter-defibrillators left leftventricle medical methods models myocardialcontraction myocardialinfarction myocardium pacemaker pathophysiology physiology physiopathology prevention qv150s9897s1982 standards sudden suddendeath therapy treatment ventricularfunction ventricularremodeling wg200l4951993 wg280d5411986 wg370c26732008