Prolonged QT interval is not seen in?
Hypercalcemia: The most common ECG findings of hypercalcemia are a sho QT interval secondary to a shoened ST segment. There may also be a widened or flattened T wave; however, significant hypercalcemia can cause ECG changes that mimic an acute myocardial infarction Ref Harrison 20th edition pg 1534
Hypokalemia
Hypocalcemia
Hypomagnesemia
Hypercalcemia
C.V.S