<prompt> Sudden decreasd end tidal CO2 in GA causesCardiac arrestPulmonary hypeensionMalignant hypehermiaMalignant extubation  <response>: Complications of Anaesthesia During anaesthesia: Respiratory depression - Salivation, respiratory secretions Cardiac arrhythmias Fall in BP Aspiration Laryngospasm and asphyxia Awareness Delirium and convulsion Fire and explosion 