Palpitation

A palpitation is an abnormal, rapid beating of the heart, brought on by overexertion, disease or drugs, or as a symptom of panic disorder. It can also refer to a shaking motion.

Nearly everyone experiences a very occasional awareness of their own heart beating, but when it occurs frequently, it can indicate a problem. Palpitations may be felt with heart problems, but also in anaemias and thyroid malfunction.