Its widgets, support for 3G and 4G devices, and per-app display makes it the most useful app in the category. Whether you have an unlimited data plan or you're interested in carefully monitoring the mobile data you use, Android users have plenty of options when it comes to tools that keep track of their mobile data usage.
Symptoms of hypocalcemia include paresthesia, muscle spasms, cramps, tetany, circumoral numbness, and seizures. Hypocalcemia can also present with laryngospasm, neuromuscular irritability, cognitive impairment, prolonged QT intervals, electrocardiographic signs of myocardial infarction, or heart failure.
Why is QT interval prolonged in hypocalcemia? This is because of lengthening of the ST segment. Lengthening of the ST segment in turn represents prolongation of Phase 2 of the action potential in the working myocardium. This happens as the calcium gradient driving calcium influx into cardiac myocytes in the plateau phase is reduced in hypocalcemia. This also explains why QT interval is shortened in hypercalcemia. Reference: Basil M. RuDusky.