Welcome to HCM. I am Dr Anshul Varshney.
I have read your query in detail. I understand your concern.
High ammonia and Visible veins can be a sign of Chronic Liver Disease
i advise you following:
1. Liver function test
2. USG Abdomen
5. Viral markers.
This is my best advice for you with the available details, if you have any further query, please ask us.