<prompt> Answer this question truthfullyWhat is the potential cardiac complication associated with tricyclic antidepressants TCAs, and what is the specific electrocardiographic abnormality that can lead to this complication?  <response>: <reason> TCAs are a class of antidepressants that can cause QT interval prolongation, which can precipitate Torsades de pointes, a potentially life-threatening cardiac arrhythmia. 