7/1/23, 5:04 AM QT interval, prolonged Pathway Feedback Search Clinical Topics Home Findings QT interval, prolonged QT interval, prolonged More common causes Acute starvation Myocardial infarction Hypothermia Hypothyroidism Hypoglycemia Stable ischemic heart disease Familial long QT syndrome Hypokalemia Less common causes Anorexia nervosa Hyperkalemia Hydrocephalus Myotonic dystrophy Hypomagnesemia Hypocalcemia Tricyclic antidepressant overdose https://web.pathway.md/findings/rec2FFDzBJrMmMx46 1/2 7/1/23, 5:04 AM QT interval, prolonged Pathway Intracranial hypertension https://web.pathway.md/findings/rec2FFDzBJrMmMx46 2/2