Heart palpitations are the feelings of having rapid, fluttering or pounding heart. Heart palpitations can be triggered by stress, exercise, medication or, rarely, a medical condition. Although heart palpitations can be worrisome, they re usually harmless. In rare cases, heart palpitations can be a symptom of a more serious heart condition, such as an irregular heartbeat (arrhythmia), that may require treatment. Palpitations that are infrequent and last only a few seconds usually don t require evaluation. If you have a history of heart disease and have frequent palpitations or have palpitations that worsen, then you will need a repeat work up with long-term heart-monitoring tests to see if your palpitations are caused by a more serious heart problem. Seek emergency medical attention if heart palpitations are accompanied by: Chest discomfort or pain, Fainting, Severe shortness of breath, Severe dizziness. I would recommend avoiding stress, caffeine, tobacco, alcohol, and stimulants like red bull. Some inhaler can cause this symptoms as well.