Is It Possible To Get Seizures While Being Brain Dead?

my dad stopped breathing friday night and was rushed to the hospital. Originally they said he was brain dead. They found 90% blockage in one artery and 80% in another. Stints were put in to address the blockage and appear to be successful. He had seizures throughout the day yesterday as the heart flow rhythem was trying to return. Question is can you have seizures while being brain dead?