Elevation is associated with<unk>  damage
Elevations in AST >> ALT suggest<unk>  damage from alcoholism (i.e. alcoholic hepatitis)
Elevations in ALT >> AST suggest<unk>  damage from another etiology (i.e. infectious hepatitis)
Liver function tests
Cardiac enzymes
HIV testing 
Cardiac ultrasound
ECG 
Urine toxicology screen
Microbiology 
Biliary ultrasound