Symptoms of palpitations include feelings that your heart is: Skipping a beat Fluttering Beating too hard or too fast You may have these feelings in your chest, throat, or neck. They can occur during activity or even when youre sitting still or lying down. Palpitations often are harmless, and your heart is working normally. However, these feelings can be a sign of a more serious problem if you also: Feel dizzy or confused Are light-headed, think you may faint, or do faint Have trouble breathing Have pain, pressure, or tightness in your chest, jaw, or arms Feel short of breath Have unusual sweating Your doctor may have already told you that your palpitations are harmless. Even so, see your doctor again if your palpitations: Start to occur more often or are more noticeable or bothersome Occur with other symptoms, such as those listed above Your doctor will want to check whether your palpitations are the symptom of a heart problem, such as an arrhythmia (irregular heartbeat). 
What are the symptoms of Heart Palpitations ?