http://emedicine.medscape.com/article/2035949-overview eMedicine http://emedicine.medscape.com/article/2035949-overview tetralogy of Fallot tetralogy of Fallot http://emedicine.medscape.com/article/2035949-overview#a0101 Tetralogy of Fallot. Medscape. http://emedicine.medscape.com/article/2035949-overview#a0101