Or is the cause not the heart, but the compression of nervous system, cardiac vagus nerve and intestinal vagus nerve? Central? Is it a hereditary developmental malformation in a certain position? . The same is true for parents, which is very likely. If you find a problem, you may name the disease after you. . .
Personally, the effect of drug treatment is not good. His parents died or were there any complications? If not, I don't think his condition needs treatment. Symptomatic