Comparative evaluation of the inotropic effect of lipophilic and hydrophilic forms of 17P-estradiol and progesterone

Abstract

Changes in the contractility under the effect of lipophilic and hydrophilic 17^-estradiol and progesterone were studied on an isolated atrial auricula. The hydrophilic forms of female sex steroids possessed a higher cardiotropic activity than their lipophilic analogs. Lipophilic 17^-estradiol suppressed, whereas the hydrophilic form boosted the contractile function of the isolated rat atrium. Progesterone depressed cardiac contractility, no matter which forms were used.