Andersen-Tawil Syndrome (ATS) is a rare genetic disorder which may cause periodic paralysis, unusual heart rhythms, and developmental problems. It is a condition with a wide range of symptoms that can be unpredictable and challenging to manage. PTCH1-related syndrome, Dandy-Walker variant, and Timothy syndrome are some of the synonyms for Andersen-Tawil Syndrome. PTCH1-related syndrome is a condition that affects multiple organ systems, including the heart, brain, skin, eyes, and bones. Dandy-Walker variant is a type of brain malformation that affects the cerebellum, causing difficulties with movement and balance. Timothy syndrome is a rare condition that affects the heart and other parts of the body, causing a range of symptoms from mild to severe.