CAN PTSD In A Vietnam Vet Cause A Panic Attack

CAN PTSD in a Vietnam vet cause a panic attack in the middle of the night that wakes the vet up? He experiences sever and sharp pains in his chest repeatedly and becomes short of breath. When he goes to the VA Hospital he is told, after testing (x-rays taken after drinking a liquid that he said ended his pains) that he did NOT have a heart attack. This man also has diabetes mellitus, Parkinson's, and some skin cancers over the years.