Dilute blood clot lysis time and electrophoretic lipoprotein fractions in a population sample of healthy Romanians. 
Serum total lipids and cholesterol, electrophoretically determined lipoprotein concentrations, serum pseudocholinesterase and dilute blood clot lysis time were determined in 630 healthy subjects (287 men and 343 women) aged 20-60, working in the food industry.  A high incidence of over-weight was noted ranging from 22.4% in women aged 20-40 to 58.7% in men aged 41-60.  Over-weight subjects presenting higher levels of serum cholesterol, total lipids and of the pre-beta electrophoretic fraction also had a higher pseudo-cholinesterase activity and a more delayed clot lysis time than normal-weight subjects matched as to age and sex.  When the material was divided into quintiles for pre-beta- and beta-lipoproteins, a highly significant delay of fibrinolysis was noted in the fourth and fifth quintiles for pre-beta-lipoproteins, but no significant changes of lysis time occurred with increasing concentrations of beta-lipoproteins.  Possible explanations of the abovementioned findings are briefly discussed.