<prompt> High spinal anaesthesia characterized by: September 2012Hypeension and tachycardiaHypeension and bradycardiaHypotension and bradycardiaHypotension and tachycardia  <response>: 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 