Was put on Cartia XT 180 for initial onset of an Afib occurrence. That was 10 months ago. I have a congenital heart murmur, was under a lot of stress and not eating well. I weighed 252 pounds. Since the Afib attack, I have changed eating habits and so far I have lost 30 pounds, I'm down to 222. My resting heart rate is 67, BP 140/78. I was on Lisinopril before the Afib for hypertension. Doctor took me off of that and put me on Cartia when discharged from hospital. I have been having heart flutter, flushing and headaches on Cartia and would like to stop it . I missed a dose yesterday, and feel so much better (no flutters or headache this morning) that I don't want to start today with another dose of Cartia. What would be the effects if I do not take today's dose?