Dear Dad of India,
Without evaluating your daughter and these studies, I cannot say exactly if there is a problem, or not. I can say that, in newborns, there is often a little right sided enlargement of the atrium and ventricle, as the pressure across the lungs is higher as a newborn, then drops over time. A PDA and PFO are both normal findings in a newborn. They spontaneously resolve, although a PFO can persist in up to 25% of adults. It may be too soon to tell if the PFO is a small ASD (actual defect), but either way, it sounds small and likely to not cause a problem.
The bigger question is if there is some other issue that is causing dilation of the pulmonary arteries, like high blood pressure across the lungs. Your cardiologist should be able to assess that and let you know.
From a natural foods/diet standpoint, the answer is that there are no special foods or different diets necessary. As in any child, no sugary drinks, limit junk food, etc. As long as the diet is balanced in appropriate nutrients and does not have high unnecessary fat content, you should be fine.
Thanks for your comments!
Any concerns of long term heart safety based on above info and possible higher load on left part of heart?
Also, in your opinion wht typically causes diliated pulmonary arteries in new borns?
Thanks again for ur time and knowledge!