Vasovagal Syncope
Common faint
🔹Predisposing factors:
- Hot/crowded enviornment
- Fatique
- Pain
- Prolonged standing
- Hunger, emotional
🔹Pathophysiology:
Prolonged standing
⬇️
⬇️ filling of Ventricle
⬇️
Venous pooling
⬇️
⬆️ sympathetic activation
⬇️
contraction of Ventricle
⬇️
Stimulation of Myocardial mechanoreceptors & vagal afferent fibers
⬇️
Vasodilation & Bradycardia
⬇️
Hypotension & Syncope
🔹Management:
•Stop the procedure
•Patient placed supine with legs slightly elevated
•Muscular movements, aids the return of blood from periphery
•If thought necessary, oxygen may be administered, using full-face mask or nasal hood.
•An ammonia ampule may be crushed and held under patient’s nose.
•Postponement of dental procedure.
Dr. Mehnaz Memon🖊
References: Practical medicine guide by PJ Mehta; Internet
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