<prompt> All of the following are features of hypocalcemia, except:Carpopedal spasmNumbness and tingling in the circumoral regionHyperactivity of tendon reflexesShoening of Q-T interval in ECG  <response>: ECG Changes Causes of QT prolongation on an ECG Causes of QT prolongation on an ECG: Congenital Stroke Hypokalemia Hypoglycemia Hypocalcemia Hypomagnesemia Myocardial infarction Intracranial hemorrhage Hypothyroidism, pituitary insufficiency Ref: ECG Interpretation: From Pathophysiology to Clinical Application By Fred Kusumoto, Page 74; Harrisons Internal Medicine, 18th Edition, Chapter 46 