The present invention relates to the use of a plant material of the species Trichilia sp., alone or in association with one or more of the following plants: Paullinia cupana (Sapindaceae), Croton moritibensis (Euphorbiaceae) and Zingiber officinale (Zingiberaceae) in the treatment, reversion, combat and/or prevention of ventricular fibrillation. A product particularly embraced by the present invention comprises the plant material of the species Trichilia sp., alone or in association with extracts from other plants. The invention also refers to the use of one or more fractions of plant extract from such plant material, particularly of Trichilia catigua A. Juss, and of one or more subfractions of said fractions in the treatment, combat, prevention and/or reversion of ventricular fibrillation.