Objective: To screen the vasodilative fractions from Hebeibalmy chrysanthemum and analysis the possible mechanism.
Methods: Observing the effects of several extracts ofHebei balmy chrysanthemum in the rabbit isolated thoracicaorta rings pre-contracted phenylephrine (PE, 1μmol·L~(-1)), andanalysing the effects of the active fractions on thevasoconstriction induced by high K~+, PE, extracellular Ca~(2+) andintracellular Ca~(2+).
Results: The fractions of extract residuum, ethyl ac...