Created at 8:48 a.m. Feb, 03, 2026
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Dirty Medicine: Electrocardiograms (ECG) Made Easy step 2 video
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Which electrolyte disturbance causes U waves and flattened T waves on ECG?
{{c1::Low K+ (hypokalemia)}}
Extra
May also cause ST-segment depression, prolonged QT interval, and arrhythmia (PAC, PVC, torsades de pointes)

"An ECG in a person with a potassium level of 1.1 showing the classical ECG changes of ST segment depression, inverted T waves, large U waves, and a slightly prolonged PR interval."
Photo credit: James Heilman, MD, CC BY-SA 3.0, via Wikimedia Commons

"An ECG in a person with a potassium level of 1.1 showing the classical ECG changes of ST segment depression, inverted T waves, large U waves, and a slightly prolonged PR interval."
Photo credit: James Heilman, MD, CC BY-SA 3.0, via Wikimedia Commons
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