First Time User? Sign Up Now
First Time User? Enroll now.
Home > Health Library > Syncope
Syncope is a loss of consciousness (fainting) that occurs when blood pressure drops very low and not enough blood reaches the brain. A person may have shortness of breath, palpitations, or chest discomfort before fainting.
The reduction in blood flow usually happens quickly, which causes symptoms to appear suddenly.
Syncope can be caused by several conditions, such as dehydration, low blood volume, nervous system problems, heart problems, or a drop in blood pressure (orthostatic hypotension) when you move from a laying to standing position.
Syncope requires medical attention.
Current as of: October 19, 2020
Author: Healthwise Staff
Medical Review:William H. Blahd Jr. MD, FACEP - Emergency Medicine & Adam Husney MD - Family Medicine & Kathleen Romito MD - Family Medicine
To learn more about Healthwise, visit Healthwise.org.
© 1995-2021 Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated.