In high spinal anaesthesia what is seen -: (A) Hypotension & Bradycardia, (B) Hypotension & Tachycardia, (C) Hypeension & Bradycardia, (D) Hypeension & Tachycardia
Answer is A. High spinal anaesthesia involving T4 thoracic segment blocks sympathetic autonomic fibres for hea resulting in vagal dominance. Hence, hypotension and bradycardia occur.