Abnormally rapid heartbeat, also known as tachycardia, is a condition in which the heart beats faster than normal. It is caused by an increase in electrical activity in the heart and can be caused by a variety of factors, including stress, anxiety, or certain medications. The term 'abnormally rapid heartbeat' is composed of three words: 'EVERY, ' 'pitapat, ' and 'systole.' 'EVERY' is a five-letter word meaning 'all, ' 'pitapat' is a seven-letter word meaning 'rapidly beating, ' and 'systole' is a seven-letter word meaning 'contraction of the heart muscle.' Together, these three words describe an abnormally rapid heartbeat.