The influence of unsaturated fatty acids on prostaglandin-release in isolated perfused guinea-pig hearts.

Isolated perfused hearts of guinea-pig continuously release a prostaglandin-like substance into the effluent. Polyunsaturaed fatty acids, linoleic acid and arachidonic acid greater than linolenic acid, induced an increase in PG-efflux. Oleic acid was without effect. The results suggest that PG-formation is involved in the increase of contractile force and coronary flow after administration of linoleic, linolenic and arachidonic acids.