Ventricular arrhythmias are abnormal heart rhythms that occur due to a disturbance in the cardiac conduction system. Ventricular arrhythmias include ventricular extrasystoles, ventricular tachycardia and ventricular fibrillation. Ventricular extrasystoles (VES) are the most common form of arrhythmias, and can even occur in healthy people. Ventricular tachycardia (VT) and ventricular fibrilation (VF) can cause sudden cardiac death. Symptoms that are the most common in patients with ventricular arrhytmias are palpitations, weakness, shortness of breath, dizziness, loss of consciousness and angina pectoris. The electrocardiogram is the most important test method in establishing the diagnosis. New technology developments have enabled the prevention and treatment of ventricular arrhythmias, that is, the prevention of sudden death. In addition to treatment by antiarrhythmics and electrical cardioversion, a positive impact in treatment is also seen with the implantation of cardioverter defibrillator and radiofrequency ablation. The nursing role is significant in participating in diagnosis and therapeutic procedures. In Cardiac Intensive Care Unit, she is responsible for continuous monitoring of the patients, early detection of signs and symptoms of life-threatening arrhythmias, and undertaking emergency care procedures that save the patient's life. Furhermore, the nurse is tasked to assist in resuscitation procedures, patient defibrillation, electrical cardiovesion, and patient care before and after therapeutic procedures such as the installation of a cardioverter defibrillator and radiofrequency ablation. The scope of a nurse's work for patients with ventricular arrhythmias includes the enforcment of health care, conducting nursing interventions to solve the patient's problems and health education. Health education for patients with ventricular arrhythmias is based on training the patient to recognize the arrhythmia, take prescribed therapy, and acquire knowledge and skills for life after the cardioverter defibrillator installation.