Differential Diagnosis of Syncope First, is it syncope? History is very important for distinguishing syncope from other causes (seizure, dizziness, vertigo, presyncope). Ask about precipitating events, prodromal symptoms, post-ictal confusion. Common causes of syncope and their associated symptoms are detailed in the figure below. #Diagnosis #EM #Neuro #IM #Sycope #Causes #Differential #Algorithm #Ddxof