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Related Subjects:
|Transient Loss of Consciousness
|Vasovagal Syncope
|Syncope
|Aortic Stenosis
|First Seizure
|Carotid Sinus Syncope
β‘ Immediate management: Lay the patient flat and raise their legs to increase cerebral blood flow.
βΉοΈ About
βοΈ Pathophysiology
π§Ύ Clinical Features
ποΈ Causes of Syncope
Type Details
π Vasovagal
Situational (church, standing, hot bath, toilet, venesection).
Prodrome: tinnitus, dimmed vision, pallor, impending faint.
Recovery: rapid once supine, patient flushed & sweaty but not confused. May jerk or pass urine.
π Postural
Fainting on standing β autonomic dysfunction, hypovolaemia, salt depletion, or antihypertensives/antianginals.
β€οΈ Arrhythmias
Bradycardia or tachycardia reduce CO.
Loss of consciousness irrespective of posture.
Stokes-Adams attack = sudden loss of ventricular contraction (progression to complete heart block).
π Carotid sinus syncope
Elderly; hypersensitive carotid sinus.
Trigger: tight collar/light pressure β reflex bradycardia & syncope.
π Exertional syncope
Aortic stenosis or HCM.
Heart cannot increase CO during exertion.
β€οΈ Cardiac Causes (High Risk)
π Clinical Assessment
π§ͺ Investigations
π Management