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Electrolytes abnormalities and EKG

Electrolyte Abnormality

EKG findings

Hypokalemia

Flattened T waves, U waves, premature ventricular complexes

Hyperkalemia

Peaked T waves, widened QRS complex, ↑P-R interval, loss of P wave, loss of R wave amplitude, ST segment depression, sine wave, ventricular fibrillation and asystole

Hypocalcemia

Prolonged QT interval

Hypercalcemia

Short QT interval, short ST segment

Hypomagnesemia

Increased P-R and QT intervals and increased incidence of atrial fibrillation

Hypermagnesemia

Increased P-R interval and wide QRS complex


Reference: Barash Clinical Anesthesia 6th Edition pg. 1352

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