Ixtab's symbol is represented with a rope. The Mayan culture believed that suicide would lead you to heaven.
Information on Ixtab
Ixtab is the goddess of suicide. Her planet was know as Venus. She was represented with a rope around her neck because the Mayans believed that if one sacrificed themselves they would go to heaven instead of going to the underworld. She was also the protector of the people who have committed suicide.
Myth: Ixtab's job
When a human has a violent or suicidal death may enter the realm of heaven. Ixtab would escort them to paradise and serve them food and drink in the shade of the world tree.