Abstract:Rats were free-radical-damaged by xanthine 6.4 mg·100g-1·d-1 and xanthine oxidase 0.1U·100g-1 d-1 to cause significant decrease in the cardiac functional parameters. Panaxatriol saponins 10mg·100g-1·d-1 converted all the indices toward normal without exception. Panaxadiol saponins were more effective than panaxatriol saponins.