Hypocalcaemia is characterized by the following features except
Numbness and tingling of circumoral region
Hyperactivity tendon reflexes
Shoing of QT interval in ECG
Carpopedal spasm
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 1421
C.V.S