Strokes and heart attacks. Stroke is an acute cerebrovascular accident characterized by a sudden appearance of focal and / or cerebral neurological symptoms that lasts for more than 24 hours. It may lead to the patient’s death within a short period of time. In industrially developed countries the diseases of the cardiovascular system are the leading cause of death. An increasing number of people die at their working age. Heart attack is a common cause of death. Heart attack is the most dangerous complication of cardiovascular system diseases. Only about 50% of patients worldwide survive after heart attack.