Dietary effect on platelet aggregation in men with and without a family history of essential hypertension.

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Abstract
Platelet aggregation induced by 5 microM adenosine 5'-diphosphate (ADP) was significantly higher in men with a family history of essential hypertension than in men without such a history when they were fed a low fat-cholesterol diet with low salt. Platelet aggregation activity was remarkably increased in both groups when the diet was changed from low salt into high salt. Platelet aggregation activity was higher in the group with a positive family history of hypertension on the low fat-cholesterol plus high salt diet than in the group without a family history under the same conditions. The activity was slightly increased in both groups when fed a high fat-cholesterol diet with low salt. There was no significant difference in the platelet aggregation between the two groups. The activity was significantly increased in both groups on the high fat-cholesterol diet after the diet was changed from low salt to high salt. Under both the low and high fat-cholesterol diets, the mean blood pressure was significantly elevated in response to excessive salt intake in the group with a family history of essential hypertension, but it was not elevated in the group without such a family history.