<prompt> Hypercalcemia in ECG is diagnosed by-Increased QT intervalDecreased QT intervalIncreased PR intervalTall T waves  <response>: The main ECG abnormality seen with hypercalcaemia is shoening of QT interval In severe hypercalcaemia, Osborn wave J waves may be seen Ventricular irritability and VF arrest has been repoed with extreme hypercalcaemia Increased PR interval and tall T waves are not seen in hypercalcemia Ref Harrison 20th edition pg 1523 