title: The prolonged QT interval--a frequently unrecognized abnormality.
mesh_terms: D000368:Aged; D000768:Anesthesia, General; D000889:Anti-Arrhythmia Agents / Q000009:adverse effects; D001145:Arrhythmias, Cardiac / Q000503:physiopathology / Q000628:therapy; D002648:Child; D004562:Electrocardiography; D005260:Female; D006321:Heart / Q000503:physiopathology*; D006330:Heart Defects, Congenital / Q000503:physiopathology; D006331:Heart Diseases / Q000503:physiopathology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011379:Prognosis; D013610:Tachycardia / Q000503:physiopathology; D014693:Ventricular Fibrillation / Q000503:physiopathology
chemical_list: D000889:Anti-Arrhythmia Agents