<prompt> Most common cause of death after anaesthesiaHypothermiaHypotensionCardiac arrestAtelectasis  <response>: C Cardiac arrest 131- Ajay Yadav 5thMore than 80 of cardiac arrest occurs at the time of inductionHypotension -may occurs in intraoperative and post ooperatve period due to effect of anaesthatic drugs, inadequate fluid infusion, excessive loss, cardiac arrhythmiasHypothermia - is the most common thermal pertubation seen in anaesthesia. Heat loss during general anaesthosia may be as high as 30 kcal hr Shivering occurs as a protective mechanism to hypothermia, 02 consumption may increase to 4 times 400 Shivering can be abolished by inhibition of hypothalamus Most common shivering is seen after halothane Pethidine is drug of choice. Tramodol is 2nd drug of choiceAtelectasis is the MC pulmonary complications of GA in post operative period and the MC cause of at electasis is bronchial obstruction by secretions leading to lobar or segmental collapse VQ mismatch.Post operative respiratory depression has been cited as the most common cause of anaesthesia related death in perioperative period. 