In Zachary, LA, there is at least one medical 'diagnostician,' one Clayton Brown. It seems to me that a diagnostician should be consulted at this point. There are more such specialists in Baker, LA.
That's my whole point, the vasovagal syncope can cause pain in the chest. What needs to be established (if it is syncope) is the trigger for the system to kick in. There are quite a number of possible triggers, even a severe case of POTS. Other triggers can be nutrition, dehydration, stress, lack of sleep, low sugar, malfunctioning nerves, arousal. The list is extensive beyond this and can even be triggered by coughing or swallowing. The first reaction of blood being stored in the legs and the heart trying to work harder to compensate, but at the same time being slowed down could give chest pain among other reasons. I think the blood pressure monitor should show if this is a possibility because you would expect a sudden drop. However, it depends on how often the pressure is taken. When I wore a cuff over a 24 hour period, it took readings every 30 minutes which could be totally inadequate. It would be all over before the next reading is taken.
Pain, and the combination of pain and fear, can certainly be responsible for a vasovagal faint.
But the cause of the pain remains to be figured out.
As noted, there does not seem to be any reference to a Holter monitor, nor to a stress test. I wonder why these were not done.
Just out of interest has anyone mentioned the possibility of vasovagal attacks also known as neurocardiogenic syncope?
The times you went to the hospital I assume that the pains had stopped by then? If so, ask the Doctor to fit your husband with a holter monitor and blood pressure monitor. The length of time these are usually worn is 24 hours, so be sure to say you want them on his body until the next occurrence of symptoms. This way you will know if anything abnormal is happening with his heart rhythm, and his blood pressure. From the recording of the heart rhythm they will be able to tell what the problem is.
This is indeed a mystery, and one that requires considerable medical sophistication.
If I were you, I would post the question at the Heart Disease Expert Forum, where an MD will answer.
However, I am curious about when and how your husband's attacks occur:
Do they tend to happen more during the day, or at night?
Is he doing anything in particular when this occurs?
Can he describe the pain? Sharp or gnawing, long lasting or brief, and so on?