1: Reflex syncope Neuro-cardiogenic (vaso-vagal), carotid sinus syndrome, situational (micturition) 2: Cardiogenic Arrhythmias – Tachyarrhythmia: WPW (especially with Afib), Brugada, Long QT syndrome, – Bradyarrhythmia: Second degree AV Block Mobitz II, Third degree AV block, Sick sinus syndrome – Structural heart disease (HOCM, LVOT obstruction, Aortic stenosis, Intracardiac tumor: Myxoma 3: Orthostatic