Ad hoc is a Latin phrase, literally meaning “for this.” It typically implies a solution designed for a particular problem or task—that is, something not broadly generalizable. When the term was introduced more than 2 decades ago to cardiologists in the context of percutaneous coronary intervention (PCI), it suggested the unique circumstances that justified combining coronary angiography and PCI into the same setting.1 This approach was uncommon in the early years of PCI when most procedures were performed days to weeks after the initial diagnostic test.
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