A vasovagal attack is a disorder that causes a rapid drop in heart
rate and blood pressure, resulting in
decreased blood flow to the brain and fainting. Vasovagal attack is the most common cause of fainting. The disorder is also referred to as neurocardiogenic syncope. A vasovagal attack is the most common cause of fainting. A vasovagal attack may occur in a person of any age, but the attacks are more common in children, young adults, and the elderly.