Which one of the following electrocardiographic changes is found in hypercalcaemia?

Which one of the following electrocardiographic changes is found in hypercalcaemia?

a. Increased QRS interval
b. Prolonged Q-T interval
c. Short P-R interval
d. Short Q-T interval

Ans. The key is D. Short Q-T interval. [Short Q-T interval secondary to a shortened ST segment].