Heart palpitations
Truthfully, anytime you notice changes in your heart rate, you should see your doctor. When your heart beat suddenly becomes noticeable, heart palpitations could be a sign that blood is not flowing the way it should. This can feel like a heart pounding, fluttering, or beating irregularly. It will usually last for just a few seconds or minutes. It is possible that you will feel these sensations in your neck or throat, as well.