This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Anaesthesia
High spinal anaesthesia characterized by: September 2012 
Select and explain. 
A. Hypeension and tachycardia, B. Hypeension and bradycardia, C. Hypotension and bradycardia, D. Hypotension and tachycardia
C: Hypotension and bradycardia
Answer: C: Hypotension and bradycardia 
Explanation: Ans. C i.e. Hypotension and bradycardia Spinal anaesthesia Site of SA in adults: L2-L3/ L3-L4 space Site of SA in children: L4-L5 space Site of action of SA: Nerve roots of cauda equina Fibres which are blocked earliest: Autonomic pre-ganglionic fibres (sympathetic) Percentage of xylocaine used in SA: 5% Feature of high spinal anaesthesia: - Hypotension and - Bradycardia