Delìrivm Còrdia is the third studio album by American avant-garde metal band Fantômas, released on January 27, 2004, by record label Ipecac.

The music, which was composed solely by Patton, could be described as the score to a horror movie and/or concept album centering on the theme of surgery without anesthesia.

Several music genres and styles are covered over the course of the album, including easy listening, chanting, drone, noise and metal, generally being separated by ambience and sounds and voices in a surgical setting.

There are no lyrics or song structures as such as one would traditionally expect; the band instead focuses on atmosphere and the creation of suspense through the use of eerie noises, wordless vocals, and sudden, jarring changes in volume and intensity.

[5] Rolling Stone awarded it three out of five stars, describing the 20-plus-minute end section as "maddening", though noting that it "demands repeated listens, if only to hear the freakish wonder that is Mike Patton's voice".