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Additional inclusion criteria for obstetric anaesthesia were: cardiac arrest associated with neuraxial block performed by an anaesthetist outside the operating theatre (labour epidural analgesia); and cardiac arrest associated with remifentanil patient\u2010controlled analgesia. There were 28 cases of cardiac arrest in obstetric patients, representing 3% of all cardiac arrests reported to NAP7, giving an incidence of 7.9 per 100,000 (95%CI 5.4\u201311.4 per 100,000). Obstetric patients were approximately four times less likely to have a cardiac arrest during anaesthesia care than patients having non\u2010obstetric surgery. The single leading cause of peri\u2010operative cardiac arrest in obstetric patients was haemorrhage, with underestimated severity and inadequate early resuscitation being contributory factors. When taken together, anaesthetic causes, high neuraxial block and bradyarrhythmia associated with spinal anaesthesia were the leading causes overall. Two patients had a cardiac arrest related to labour neuraxial analgesia. There were no cardiac arrests related to failed airway management or remifentanil patient\u2010controlled analgesia.<\/jats:p>","DOI":"10.1111\/anae.16204","type":"journal-article","created":{"date-parts":[[2024,1,12]],"date-time":"2024-01-12T04:02:13Z","timestamp":1705032133000},"page":"514-523","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":45,"title":["Cardiac arrest in obstetric patients receiving anaesthetic care: results from the 7th National Audit Project of the Royal College of Anaesthetists"],"prefix":"10.1111","volume":"79","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-8130-2067","authenticated-orcid":false,"given":"D. 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