As you mentioned about symptoms , I got symptom
of discomfort in throat just 30 minutes before
Heart Attack, but I felt it could be only due to some food, oil consumed in preparation of food.This sort of discomfort was total different which I feel it after consuming some oil based food, but I could not realize the difference as I drank 2/3 glasses of water
immediately. I realized only when I perspire a lot and my pressure dropped drastically at lower levels.