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.
Smoking can cause heart palpitations. If you smoke, be sure to quit. Smoking can also increase the chance of developing heart vessel damage. Caffeine and alcohol can cause heart palpitations. Eliminate caffeine and alcohol from your diet, and your palpitations may resolve. Keep a diary of your irregular heartbeat or heart palpitations, if they are occurring regularly.