Zapping Irregular Heartbeats

In this photo provided by Washington University, Dr. Clifford Robinson works with others during an experimental treatment using radiation on the heart of Jeff Backus in St. Louis on Tuesday, Feb. 14, 2023. Robinson, who specializes in precisely focused radiation to attack cancer while avoiding nearby healthy tissue, says aiming at the heart “wasn’t on my radar at all. My goal was to miss the heart,” Robinson said. After all, some lung and breast cancer survivors experience heart disease years later from tumor radiation that reached and inflamed heart tissue. (Huy Mach/Washington University, St. Louis via AP) AP PROVIDES ACCESS TO THIS THIRD PARTY PHOTO SOLELY TO ILLUSTRATE NEWS REPORTING OR COMMENTARY ON FACTS DEPICTED IN IMAGE; MUST BE USED WITHIN 14 DAYS FROM TRANSMISSION; NO ARCHIVING; NO LICENSING; MANDATORY CREDIT

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