DEAR MAYO CLINIC: I’m 36 and do not have any significant medical concerns, but due to a family member’s heart health issues, it was recommended I have a cardiac evaluation. After undergoing an echocardiogram, I was surprised to be told that I have a patent foramen ovale. The cardiologist said I don’t need to be treated for it, but I’m still worried. Does this heart defect put me at risk for health problems? When is treatment for a patent foramen ovale necessary?