The ECG findings of hypocalcemia include:
A prolonged QT interval
A lengthened ST segment
There are many causes of a prolonged QT interval on the ECG including genetic long QT syndrome, eletrolyte abnormalities and medications.
1. Surawicz B et al. ACC/AHA recommendations for the standardization and interpretation of the electrocardiogram. Circulation. 2009;119:e235-240.
2. Chou's Electrocardiography in Clinical Practice: Adult and Pediatric, 6e