Hypomagnesemia often occurs with other electrolyte abnormalities, and these may overshadow its effects on the electrocardiogram.


Many patients with hypomagnesemia also have hypokalemia and/or hypocalcemia.


ECG changes that may be seen in a patient with hypomagnesemia:

(1) depression of the ST segment

(2) T wave changes (flattening or inversion)

(3) variation in the QT interval (may be prolonged or shortened)

(4) a prominent U wave

(5) atrial and/or ventricular arrhythmias


To read more or access our algorithms and calculators, please log in or register.