A 63-year-old woman without any known heart disease, but with a history of osteoarthritis, diabetes mellitus (using oral hypoglycemic agents), and mild chronic obstructive pulmonary disease, presents to her primary care physician for a follow-up. As part of the examination, an ECG is obtained (ECG A).
It is compared with her previous ECG obtained 1 month before (ECG B) when she was seen in the emergency department with pneumonia.
What is the diagnosis?
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