I was supposed to have surgery 9/3, but on first day of liquid diet, had a tachacardia attack. drank some caffiene in diet snapple, exercised, and had the attack. Now am scared silly. Cardiologist said sometimes high levels of ketones can cause arrithmyia. see doc friday to ask questions. detest the liguid diet of glycerna and 1cp clear broth. Not sure can handle post op or restrictive food. any comments? feedback, thanks