What Causes Loss Of Consciousness And Rolling Of Eyes?

my husband was unconscious for no apparant reason yesterday...when i found him he had urinated on himself and his eyes were rolled back. i did cpr and he came to but then was unconscious again and starting making snorking gurglind noises...it then happened a third time. he doesn't drink or do drugs...he isn't diabetic and has no health issues we know of. what do you think this might be?