But you're lucky, relatively speaking. If you were shot in the heart, your blood pressure would quickly drop, but it would take 10 to 15 seconds to lose brain function. In that time you could draw your gun, utter last words, or spend some time thinking about your unfortunate situation.
Caffeine can cause indigestion, which in turn may lead to heart palpitations. However, arrhythmia (abnormal heart rhythm) can also cause palpitations, and this condition is more of a concern. Seek medical attention if your palpitations last longer than two or three minutes.
Underlying health conditions. Indigestion can be caused by a number of health conditions. You may have a peptic ulcer, which is a break in the lining of your stomach or small bowel. You can get a peptic ulcer if stomach acid, which helps digest your food, damages your stomach lining.