Can adderall, taken legally at prescribed dose, cause a left bundle branch block in a young person?

Cardiac risks: I am not aware of a LBBB being cause by Adderall. However, pt's with long or shorQT syndrome, hypertrophic cardiomyopathy, past arrhythmia requiring resuscitation, direct current cardioversion or defibrillation, or overdrive pacing; hx of arrhythmia associated with death or sudden cardiac death are at higher risk with Adderall. For more info see: www.aafp.org/afp/2009/0515/p905.html