Is there anything that can mimic heart palpitations?

Palpitations: Although the cause of palpitations is usually benign, if they are occurring frequently, you should see a doctor to exclude a cardiac arrhythmia. The differential diagnosis of palpitations involves either cardiac (arrhythmias, valvular disease), psychiatric (panic disorder, other anxiety disorders), or miscellaneous (stimulants, thyrotoxicosis, anemia, fever, stress, or exercise).