QT prolongation is seen in all except
Hypocalcemia typically prolongs the QT interval (ST poion), whereas hypercalcemia shoens it . Digitalis glycosides also shoen the QT interval, often with a characteristic "scooping" of the ST-T-wave c (digitalis effect). Ref Harrison 20th edition pg 1534
Hypothermia
Digitalis toxicity
Hypocalcaemia
Romanowand syndrome
General anatomy