A 52-year-old woman presents with polyuria, polydypsia, constipation, and fatigue. She has no significant past medical history, and she is not on any medications. She was recently diagnosed with hyperparathyroidism.Select the characteristic ECG findings.: (A) shortened PR interval, (B) lengthened PR interval, (C) lengthened QU interval, (D) shortening of the QT interval
Answer is D. With severe hypercalcemia, the QT interval is markedly shortened. There is a correlation between the length of QT interval and the degree of hypercalcemia.