Vasovagal Syncope

Question 1

Define Vasovagal Syncope?

Answer 1

Loss of consciousness due to a transient drop in blood flow to the brain caused by excessive vagal discharge

Question 2

What is the aetiology of Vasovagal Syncope?

Answer 2

Vasovagal Syncope is a very common cause of fainting

Question 3

What can Vasovagal Syncope be precipitated by?

Answer 3

Emotions (e.g. fear, severe pain, blood phobia)
Orthostatic stress (e.g. prolonged standing, hot weather)

Question 4

What is the epidemiology of Vasovagal Syncope?

Answer 4

Very Common

Syncope (of all causes) affects 40% of people

Question 5

What are the presenting symptoms of Vasovagal Syncope?

Answer 5

Loss of consciousness lasting a short time
Patients may experience vagal symptoms (sweating, dizziness, light-headness) before passing out
There may be some twitching of limbs during the blackout
Recovery is normally very quick

Question 6

What are the signs of Vasovagal Syncope on physical examination?

Answer 6

Usually NO SIGNS