I don't think you have to worry about a heartworm, Kenvin. Palpitations are linked to stress aren't they? I know that the only time my boyfriend has palpitations is when he's stressed, has fear or anxiety about something. Could this be right for you too? Ocean is right! Do some cleanses! You found this website for a reason...check out the Bowel Cleanse or Fasting Forum. Everyone can improve their health by cleaning out the accumulated toxins in their intestines. You'll be able to assimilate the nutrients in your food better! Also, PTree posted a while back that 90% of Seratonin is synthesized in the gut! wow. Not saying you're depressed, no! But everyone could use more healthy seratonin...and cleaning out the gut (GI tract) is an easy way to do that. It would probably relieve anxiety....Just some thoughts!