Goering was pretty obese but not as bad off as Adolf. Besides Parkinson's disease, he had "rapidly advancing arterioschlerosis" and was prematurely aged.
Based on interviews and medical documents we have, it is theorized that Hitler's symptoms show that he might have arteritis. Even if true that does not mean that a person has only a short time to live.
http://capitolvascularcare.com/resources/arterial-conditions/