Our 10 year old granddaughter passed out after swim practice one morning this summer(did not eat breakfast before practice)...she was taken to ER by squad. There was a slight irreg ht rhythm; doc said don t worry. He recommended a followup with cardiologist, which they did. About a week later she vomited after practice. Yesterday she felt lightheaded at school in am-had eaten graham cracker for breakfast. The cardiologist had recommended having more salt in diet, more fluids, more potassium. There is a stress test scheduled, but I had never heard of a problem like this-especially in children. What is the prognosis? Her other grandmother had severe electrical problems with her heart. I am an RN, and took care of her on a coronary stepdown unit 15 years ago. I m not sure if there were implanted defibrillators then, but she would go into V-tach, and would require going through the entire ACLS protocol to the last medication-I can t remember it- to stop the ventricular fibrillation. I am concerned about our granddaughter. Lynne YYYY@YYYY