My friend s husband had a heart attach and was without oxygen to his brain for eight minutes (He also had a stroke while he was being revived). He has short term memory loss, speech problems and mobility problems. His heart is also only operating at 10%. He is leaving the hospital in two days, without oxygen, only a vest defibrillator (he is not strong enough to have the implantable defibrillator put in), and no home healthcare. How worried should my friend be about leaving her husband, for even a few hours alone a day?