Hypercalcaemia in ECG is diagnosed by
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 complex (digitalis effect). Ref Harrison 20th edition pg 1532
Increased QT interval
Decreased QT interval
Increased PR interval
Tall T waves
General anatomy