[Comparison of the mechanism of cardiotonic action of the fraction 3 of MAI-BAO and digoxin on rat isolated heart].

Unlabelled: MAI-BAO (MB) is a beverage obtained by fermentation of sweet Camellia sinensis tea by the Tea-Mushroom treasure. The action of the chromatographic fraction 3 of MAI-BAO (MB-F3) is cardiotonic.

Aims: To compare the mechanism of cardiotonic activity of MB-F3 and digoxin (Dx) in rats.