-Commonly see large S wave in lead I, ST depression in lead II, and a Q wave with an inverted T in lead III.
-there is commonly T wave inversion in lead V1-V4
-may cause a right bundle branch block
Hyperkalemia
-with elevated K the P wave is flattened, the QRS complex is widened, and the T wave becomes peaked
Hypokalemia
-with low K the T wave becomes flattened, and there can be a U wave
Hypercalcemia
-the QT interval becomes shortened
Hypocalcemia
-the QT interval becomes prolonged
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