Comment to 'A 74-year-old woman presents to the ED with an irregular pulse and bradycardia.What is causing her bradycardia?[[sd_correct]]2[[/sd_correct]][[sd_short]]Dx: Blocked PACs.[[/sd_short]][[sd_long]]Explanatory video below. [[/sd_long]][[sd_lumi]]https://app.lumi.education/api/v1/run/K0jv_D/embed[[/sd_lumi]]'
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