KnowraCyanosisLinked fromLinked fromThe 8 pages that link to Cyanosis, each with the reason it gives.All 8Related 8HypoxiaRelated: It is a visible sign that may accompany some forms of oxygen deficiency, but can be absent.HypoxemiaRelated: It can accompany severe hypoxemia, but its absence does not rule it out.Congenital heart defectRelated: Right-to-left shunting can lower arterial oxygen enough to produce this sign.MethemoglobinemiaRelated: Methemoglobin can cause cyanosis even when dissolved oxygen in arterial blood is adequate.AsphyxiaRelated: It may become visible when severe oxygen deprivation changes blood coloration.Tetralogy of FallotRelated: Reduced oxygenation can make the condition visibly cyanotic.AnoxemiaRelated: It can signal inadequate blood oxygenation, though its presence and absence are not definitive.Transposition of the Great VesselsRelated: Poorly mixed blood reaching the body produces cyanosis in many affected newborns.