Pedialyte.
Start with a few teaspoons every 5 minutes. When they can drink without throwing up, try giving larger amounts.
Sedentary individuals are often lethargic and show early symptoms of obesity. Less exercise means a slower metabolism. A slower metabolism means that even if an individual is eating what they normally should, it will take them a longer time to burn off the calories they gain.
Bill Paxton had a aortic aneurysm and went to have a corrective surgery, there were complication during the surgery and he died.