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
The reduction in blood flow usually happens quickly, which causes
symptoms to appear suddenly.
Syncope can be caused by several conditions, but it most often
occurs when changes in heart rate or heart rhythm reduce the amount of blood
flow to the body. Fainting caused by a problem in the heart is called cardiac
syncope. Other types of syncope that are not linked with heart problems
include neurally mediated syncope, also called vasovagal, neurocardiogenic, and
William H. Blahd, Jr., MD, FACEP - Emergency Medicine & David Messenger, MD
PeaceHealth endeavors to provide comprehensive health care information, however some topics in this database describe services and procedures not offered by our providers or within our facilities because they do not comply with, nor are they condoned by, the ethics policies of our organization.