循环杂志2月17号刊出的心电图挑战，大家看看！
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An 84-year-old man with known hypertension and coronary artery disease and previous coronary
artery bypass graft surgery presents to his cardiologist for a routine visit. His medications
include a β-blocker, angiotensin-converting enzyme inhibitor, hydrochlorothiazide, and isosorbide
mononitrate. He is feeling well. Physical examination is unremarkable, but his pulse is noted to be
irregular. An ECG is obtained.What is the diagnosis?
artery bypass graft surgery presents to his cardiologist for a routine visit. His medications
include a β-blocker, angiotensin-converting enzyme inhibitor, hydrochlorothiazide, and isosorbide
mononitrate. He is feeling well. Physical examination is unremarkable, but his pulse is noted to be
irregular. An ECG is obtained.What is the diagnosis?
