If you have had the symptoms evaluated and found no underlying heart disease or dangerous rhythm, the primary concern is to relieve your symptoms and anxiety. Finding nothing dangerous does not necessarily mean that heart rhythm is not the source of what you feel. I usually recommend a long term monitor to try and catch the abnormal rhythm and tie it to the symptoms that you feel. Once you know what it is and that it doesn t matter, that alone makes it bearable. Avoid stimulants like caffeine, theophylline or guarine. No coffee, tea or energy drinks. Also steer clear of decongestants, bleu cheese. Generally, avoid alcohol but especially dark beer and heavy, red wines.