To assess the temporal behaviour of plasma lipoprotein ( a ) [ Lp ( a ) ] -- a low density lipoprotein-like particle whose plasma levels are associated with atherosclerosis risk -- and apolipoproteins ( apo ) B and A-I ( the major protein components of low and high density lipoproteins , respectively ) in acute myocardial infarction ( AMI ) , and to determined the effect of tissue plasminogen activator ( tPA ) on them .
