Driver's license suspended after accident involving syncope

My 54 year old son has just had an LVAD implanted, along with a new homograft aortic valve. Prior to his heart failure, he had a syncope episode probably related to a small stroke while he was driving. He was involved in a terrible accident and his license revoked. After three months in the hospital, he is home but we need to know if anyone has had a similar experience and was able to get their license back. We live in California. Thank you very much.