A heart plug was a medically implanted device seen in David Lynch's 1984 film version of Dune. Presumably used on human slaves or enemies the Harkonnens wished to torture to death, it was a small object sewed into the chest of the victim, seemingly over the heart. When a small tab in the center of the plug was pulled out, the victim's blood would flow out through the opening and the victim would bleed to death.

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