What is ALT and AST? In some cases there is a increase of ALT and AST, and to what extent and under what hepatitis?

Respond Tatyana Stepanova, a gastroenterologist, hepatologist AST and ALT - an enzyme that reflect liver function. Increased AST and ALT may be at many eabolevaniyah, particularly for chronic and acute viral hepatitis. Limits increase from a few to tens of rules. Similar question: I drink konvuleks and I raise ALT 71 and AST 48, what should I do?