One of the mysteries of the English language finally explained.
1Physiology. The subjection of a muscle to an afterload; the degree of afterload to which a muscle, especially the heart, is subjected.
2Medicine. Insertion of a radioactive substance into a receptacle previously implanted at a specific site in the body; the type of radiotherapy that uses this technique.
1920s. Probably partly from afterload + -ing, and partly from after- + loading.
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