Timothy Syndrome is characterized by which additional features besides Long QT Syndrome?

Timothy Syndrome is indeed characterized by a combination of long QT syndrome along with specific additional features, which includes hand and foot syndactyly as well as autism spectrum disorder.

Hand and foot syndactyly is a physical manifestation where two or more fingers or toes are fused together, which can be associated with various genetic conditions, including Timothy Syndrome. This condition also has a neurological component, often presenting with developmental issues, among which autism spectrum disorder is commonly noted.

The connection between the heart issues caused by long QT syndrome and these physical and developmental traits makes Timothy Syndrome a distinct genetic disorder with multi-system involvement. The other options provided list symptoms and characteristics that do not typically align with Timothy Syndrome's profile.