Thank you for the query.
Gastric problems do not cause heart attack
. The only way it can cause heart attack is due to dehydration
and ions shortage due to very frequent vomiting and or diarrhea. But such heart attack cause is very rare.
If all tests are negative and you have not had upper GI endoscopy
, you might be suffering from peptic ulcer
. IT is very common for this condition that all tests are normal except endoscopy.
Hope this will help.