Vasovagal Syncope What is vasovagal syncope? Vasovagal syncope, also called a “common faint”, is a brief loss of consciousness due to a vasovagal reflex. The vasovagal reflex is the combination of: sympathetic withdrawal causing vasodilation (vaso), and parasympathetic (vagal) disinhibition causing bradycardia. It is thus a combination of vasodilation and bradycardia. When blood pressure falls … Continue reading Vasovagal syncope