Vasovagal syncope

Vasovagal syncope (also known as cardioneurogenic syncope or neurocardiogenic syncope) is a type of syncope that is mediated by the vagus nerve. It is the most common cause of fainting.

Causes

Vasovagal syncope typically occurs when the body overreacts to certain triggers, such as the sight of blood or extreme emotional distress. The nervous system malfunctions, causing a sudden drop in heart rate and blood pressure, leading to a reduced blood flow to the brain, which results in a brief loss of consciousness.

Symptoms

Symptoms can include dizziness, lightheadedness, blurred vision, and pale skin. The person may sweat, feel nauseous, have a slower heart rate, or have a weak and rapid pulse.

Diagnosis

Diagnosis is typically based on the person's medical history and a physical exam. Tests may include an electrocardiogram (ECG), tilt table test, and blood tests.

Treatment

Treatment may involve learning to avoid triggers, physical therapy, medications, or the use of a pacemaker.

See also

• Syncope
• Vagus nerve
• Blood pressure
• Heart rate

Vasovagal syncope Resources
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