stress IS a major issue in memory deficiency. there is a simple chemical explanation. Cortisol is the stress chemical produced by the adrenal glands, so you can run really fast from pursuing dinosaurs [original plan]. now we don't have to run from them, we still have the basic stress fuel system in place.
So any stress in life triggers over-production of cortisol. and, here'e the biggie, Cortisol attacks Choline and choline is one of the most important brain chemicals that supports short-term memory function.
anyone, from sixteen to 96, experiences short-term memory issues during very stressful times. check it out with your friends going through some very stressful situation and you'll find short-term memory and concentration issues there.
in my own work with dementia, i found and have written about the fact that the majority of people later diagnosed with dementia have a very difficult start in life. so, they begin with highly stressed systems.
i'd never try to diagnose your hubby, Mz. Denial, but i do suggest a regime of tender care and support for the stressed out system (vit B complex and a really good diet, plus non-stressful exercise, plus lots of love) would all do a lot for him (and you!). and only once the stress is reduced in those ways, will you truly begin to find out what's going on with him.
my experience of the medical profession is that they too easily say someone has dementia, without considering all the issues. if his own personal doctor diagnosed him without a full alzheimer's workup, it's not a valid diagnosis anyway. it needs the full workup, including the NPH test. (don't overlook the fact that maybe, just maybe, your hubby was having work problems because of memory issues. it's not unheard of, alas)
however, you wont hurt him or you by sticking with denial for now, if that works better for you both. since there is no valid "fix" for alzheimer's right now, you won't be harming either of you with your denial at this point. be sure to talk with him about the situation and get his input too. the more you share, the more you support each other.
keep your eyes open to see what's going on with him, go to a doctor whenever you notice changes or function drop down. and understand that in the case of alzheimer's, there's nothing very meaningful in having that name and current research is showing that 50 percent of the time it has actually been the WRONG name, duh.
so, learn dementia. be in denial but know when to stop. have a greeeat vacation! it won't hurt.