If my partner has congenital heart disease with the vessel , is there any way to get pregnant with guarantee of having a healthy baby?

No guarantees: With any pregnancy at any age there is at least 4% risk of unexpected outcome.That may be prematurity, birth defect, newborn infection, etc. The inheritance of any heart related abnormality runs about 4%, which must be added to basic risk in this case.A consultation with a medical geneticist at a children's hospital or university may help you understand your individual risks.

No guarantee in life: As Ben Franklin's saying goes, "In this world nothing can be said to be certain, except death and taxes." In general, there are no guarantees in life. Life is about "likelihoods". There are many types of congenital heart defects, and many of them are not likely to be passed on to offspring. If one knows the exact type of defect, one can take that information to a Pediatric Cardiologist for advice.

Seek genetic counsel: Seek a genetic counselor to help determine risk and likelihood of the child being affected