Neurocardiogenic syncope (patient information)

Overview

Neurocardiogenic syncope is also known known as vasovagal syncope, reflex syncope, and neurally mediated syncope. It refers to a fainting spell that usually occurs in response to a specific trigger. The syncope, or fainting generally occurs due to a momentary loss of blood flow to the brain, which deprives the brain of oxygen. The fainting spell is involuntary, and there is a rapid recovery afterwards. Episodes of dizziness or lighteheadedness without losing consciousness is called pre-syncope. Injuries can occur as a risk of syncope or fainting, and syncope can signal an impending cardiac arrest. It is important to distinguish neurocardiogenic syncope from other causes of fainting or loss of consciousness, such as low blood sugar levels in diabetics, seizure, or heart attack. Neurogenic syncope is essentially a momentary failure of the brain and the cardiovascular system to communicate with each other, causing a fainting spell in response to a particular trigger. There may be a history in your family of fainting spells.

What are the Triggers for Neurogenic Syncope?

• Seeing blood or losing blood
• Pain
• Emotional stress or anxiety
• Prolonged standing
• Heat
• Physical exertion
• Defecation or urination

What are the Symptoms of Neurocardiogenic Syncope?

There may be symptoms leading up to the fainting spell, consisting of:

• Nausea
• Sweating
• Lightheadedness
• Tingling or numbness in the arms and legs
• Blurry vision
• Headaches
• Palpitations or "racing heartbeat"
• Pale in apperarance
• Warmth
• Visual "grayout"
• Abdominal discomfort