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Abstract
In a long-term investigation the serum cholesterol level was lowered with the aid
of an exchange of dietary saturated fatty acids for polyunsaturated fatty acids. After
6 years of diet, the experimental and control populations were reversed. Blood coagulation
tests were made both before and after reversal of the diets. Whole blood clotting
time (WBCT) and stypven time were determined twice, heparin tolerance time (HTT) and
fibrinolysis in euglobulins only prior to the reversal of the diet. 150 male subjects
were included in the first phase of the study; 129 of them were available for the
second phase.
On both occasions, the stypven time was shorter in the same group, in spite of the
intervening reversal of the diets. There was no difference in WBCT and HTT, but the
fibrinolysis was shorter in the control group. The intraindividual changes diverged:
WBCT became more prolonged in the group changing from polyunsaturated to saturated
fat intake, while stypven time was shortened more among the same group.
WBCT was positively correlated with cholesterol and lipid phosphorus. Stypven time
had negative correlations with relative body weight (RBW), systolic and diastolic
blood pressure, and with serum cholesterol, triglyceride and lipid phosphorus. HTT
was also negatively correlated with systolic pressure. Fibrinolysis time showed positive
correlations with RBW, cholesterol and triglycerides.
The observed lower incidence of ischemic heart disease in the group on the polyunsaturated
diet evidently was not mediated by any changes in blood coagulability revealed by
the tests used.
Keywords
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Article info
Publication history
Received:
February 27,
1973
Footnotes
☆Supported by National Heart Institute Research Grant HE-08176.
Identification
Copyright
© 1974 Published by Elsevier Inc.