If the heart feels fluttering without fast heart rate is this most likely anxiety? just felt groups of flutters today, my heart wasnt racing though.

Heart fluttering: Please see a cardiologist to make sure you do not have an irregular heart beat that is causing your "flutters". Just because your heart's rate is not rapid, does not mean that there may be nothing wrong with your heart. See a cardiologist and get a meaningful answer to your question. Good luck.

Palpitations: Palpitations have many causes from anxiety through anatomic and physiologic abnormalities. The feeling of bounding usually relates to the volume of blood pumped with each palpitation. There is no simple single answer for the question. If you're bothered by the feeling should consult a dr. To see if the problem can be clarified.