The Full Cheney is the process of having most, if not all, of your heart replaced or reconstructed by a team of skilled surgeons. Most recent recipients of the Full Cheney include comic Robin Williams, who had four operations done contiguously to replace or repair at least 2/3 of his heart. For an operation to be considered a Full Cheney, at least 50% of the heart must be altered by the surgical team in a single operation.