The typical heart beats 100,000 times a day. The rhythm of a healthy heart is known as a sinus heart rhythm. A sinus node is a group of cells in the right atrium of the heart. A sinus heart rhythm implies that the electrical impulses from your sinus node are being transmitted properly. Problems with your heart’s electrical system can cause rhythm problems.
You may have felt your heart flutter or pound during intense exercise, moments of stress, or after having too much caffeine or alcohol. Pregnancy can also cause heart palpitations. In medical language, the racing, pounding, or fluttering of the heart is termed arrhythmia. Most of the time, irregular, or abnormal heartbeats are harmless. In rare cases, they may indicate severe heart damage.