Patients with single atrium and single ventricle have a very short life expectancy without surgical treatment, with a mortality rate of more than 60%. Fifty percent of these children die within the first month of life, and more than 70% die within 6 months of birth. Patients with symptomatic single atrium single ventricle will die within 15 years of age. It is possible that secondary foramen ovale univentricular will heal spontaneously with growth and development, but this is less common. Patients who survive adolescence or undergo surgery without any discomfort, have normal cardiac function, and improve their quality of life after surgery, will live as long as normal. Five-year survival rates are generally used to assess survival in single-ventricle single-ventricle cases.