To perform this piece successfully Marion Laval-Jeantet had to slowly build up her tolerance to foreign animal bodies so that she not go into anaphylactic shock when the transfusion occurred. The duo describes the piece thusly:
As a radical experiment whose long-term effects cannot be calculated, Que le cheval vive en moi questions the anthropocentric attitude inherent to our technological understanding. Instead of trying to attain "homeostasis," a state of physiological balance, with this performance, the artists sought to initiate a process of "synthetic transi-stasis," in which the only constant is continual transformation and adaptation. The performance represents a continuation of the centaur myth, that human-horse hybrid which, as "animal in human," symbolizes the antithesis of the rider, who as human dominates the animal.
Here's A Video Documenting The Performance
And Here Are Some Photos From The Piece