The likelihood of SCD depends on gender, age, ethnicity, genetic predisposition, and the presence of heart disease. The prevalence of SCD in the general population is estimated at one case per 1000 people per year. After an initial peak in the incidence of sudden cardiac death between the ages of birth and 6 months (sudden infant death syndrome), its frequency decreases sharply and remains low in children. Among adolescents and young adults, the incidence of SCD is approximately one per 100,000 population per year. The incidence begins to increase in people over 30 years of age, reaching a second peak in the range of 45–75 years, when it approaches one or two cases per 1000 per year in the adult population.