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This case was sent by Lou B, a paramedic and RN. 2) There are three causes of tall T waves; hyperkalemia, hyperacute ischemia and normal variant (Atlas of Electrocardiography by K. He writes: "We were dispatched to a 58 yo male who had been out in the sun for 2-3 hours as a mailman. Ambulated to ambulance for eval. Wang, page 171).
If there is polymorphic VT with a long QT on the baseline ECG, then generally we call that Torsades, but Non-Torsades Polymorphic VT can result from ischemia alone. I have read articles that say that patients without ischemia are at low risk of complications from hypokalemia, But it is not entirely without risk. 1987;147(3):465-469.
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