毛冬青甲素(Ilexonin A)是从毛冬青叶提炼出来经半合成的一种化合物。本文用豚鼠离体心房肌灌流法及家兔主动脉条灌流法,观察到毛冬青甲素有增强豚鼠心房肌收缩力、阻遏去甲肾上腺素诱发的家兔主动脉条收缩张力升高的效应,对完全松弛的家兔主动脉条无增加其张力的作用。本文讨论了毛冬青甲素增强心肌收缩力及降低血管张力的可能机制。 Ilexonin A is a compound that is semi-synthesized from the leaves of the hollyhocks. In this study, isolated perfused atrial myocardium from guinea pigs and aortic strip perfusion in rabbits were used to observe the effects of oxydoptoine on the contractility of aortic strips induced by norepinephrine in aortic muscles of rabbits. There was no increase in tension in the fully relaxed rabbit aortic strips. This article discusses the possible mechanisms by which scopolamine increases myocardial contractility and reduces vascular tone.