How did heart damage happen when being infected by C hepatitis?

The base (mechanism) of liver damage in chronic hepatitis C is not well understood. The virus itself probably does not cause damage to liver cells directly. In fact, the level of virus in the blood does not correlate with liver damage observed in the liver biopsy. Liver damage by chronic hepatitis C virus is probably caused by the interaction between the virus and the body's immune system, including cytotoxic (harmful to the cells) and lymphocytes specific inflammatory messengers (cytokines)