title: Prolonged QT-interval syndromes.
mesh_terms: D000889:Anti-Arrhythmia Agents / Q000009:adverse effects; D001145:Arrhythmias, Cardiac / Q000145:classification / Q000151:congenital / Q000175:diagnosis / Q000209:etiology; D004562:Electrocardiography; D006801:Humans; D008133:Long QT Syndrome / Q000145:classification / Q000151:congenital / Q000175:diagnosis / Q000209:etiology
chemical_list: D000889:Anti-Arrhythmia Agents