Put in a call to your doctor. Palpatations are not simple benign things to "get used to." If they are happening chronically there may be something wrong. Are you taking caffeine or herbal products that could be causing the problem? Are you stressed out? Are you taking your potassium and calcium supplements-or making sure you are getting enough in your diet? The doctor can check your blood for electrolytes and let you know if you are off and tell you how to correct it. He can also order an EKG to see if you have an underlying heart condition. He needs to know you are on a low carb diet- you should not withhold info from your provider! The diet itself should not cause heart problems-it's the lack of nutrients that create side effects.