Anne8, I don't think any of us can say definitely about seizures, what your husband needs to understand us what happens with SA, we stop breathing for 10 secs or more multiple times an hour per night, in my case it was 30 times an hour, I do know of people stopping breathing 60-120 an hour. What happens when we stop breathing apart from not getting oxygen into our body, blood and vital organs, we go into the fight or flight response to stress. We wake up each of those times either consciously or sub consciously in stress. Can you imagine how much stress that puts on our bodies. That is why people are extremely tired the next day because they are basically wake most if the night, every night and are exhausted. We normally get used to it and can function but the toll it puts on our bodies is huge and then causes other illness's like depression, heart attack, stroke etc etc etc. your husband just has to do something about it but it is up to him. I wish I had known this 48 years ago my life would have been much better and I wouldn't have had to battle depression.

more likely panic attacks from stress
new CPAP users can get panic attacks from using the mask, helps to start at full pressure and to breathe deep and slow

I think that's something only a sleep doctor could tell you. Do I gather from your post that your husband is resisting the idea that he might have sleep apnea and resisting a visit to the doctor?
If you can't get him to come here and read our personal experiences, perhaps you can find info from some sleep apnea websites for him to read. At the very least completely educate yourself about the subject so you know how to talk with your husband.
Ask any questions that occur to you here and we will answer what ever we can. Sleep apnea can have very serious and even fatal consequences if untreated and yet,the treatment is so easy and so effective!
Good luck and I hope you can get him to see a doctor soon.

good luck with your husband