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Ed Koch is having surgery today at Columbia-Presbyterian to replace a heart valve. Dr. Craig Smith, the same top doc who handled Bill Clinton's bypass a few years ago, will be performing the honors. (Smith is also NYC's hunkiest cardiac surgeon, a fact that probably didn't escape Koch's attention.) And while a valve replacement is a pretty uncomplicated procedure, the 84-year-old ex-mayor appears to be prepared for all the eventualities: "God will take me if he needs legal or political advice," he quipped to a reporter. [NY1, NYP]