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Please cite this paper as: Dijkman A, Huisman C, Smit M, Schutte J, Zwart J, van Roosmalen J, Oepkes D. Cardiac arrest in pregnancy: increasing use of perimortem caesarean section due to emergency skills training? BJOG 2010;117:282–287. Objective Management of cardiac arrest in pregnancy is recommended to include perimortem caesarean section (PMCS) in the Managing Obstetric Emergencies and Trauma (MOET) course. In this study, we aimed to assess maternal and neonatal outcome of all cases of PMCS in the Netherlands performed in the last 15 years, and to test the hypothesis that PMCS was used more often since the introduction of the MOET-course in 2004. Design Retrospective cohort study. Setting Nationwide assessment of all cases of PMCS inside or outside hospitals. Population All known cases of PMCS in the Netherlands from 1993 to 2008. Methods Data collection through contacting all Dutch obstetricians and all MOET and Advanced Trauma Life Support instructors. All cases of cardiac arrest during pregnancy were collected by cross-checking with data from the Dutch Maternal Mortality Committee and a nationwide severe maternal morbidity study. Main outcome measures Incidence and case fatality rate of PMCS. Incidence of PMCS before and after introduction of the MOET course. Maternal and neonatal outcome and the process of the PMCS were analysed. Results During the study period, 55 women had a cardiac arrest, 12 of whom underwent a PMCS. Before the introduction of the MOET course, four PMCSs were performed (0.36/year), compared with eight cases after its introduction (1.6/year, P = 0.01). No PMCS was performed within the recommended 5 minutes after starting resuscitation. Eight of the twelve women (67%) regained cardiac output after PMCS, with two maternal and five neonatal survivors. Maternal case fatality rate was 83%. Neonatal case fatality rate was 58%. Conclusions Since the introduction of the MOET course, the use of PMCS has increased. Outcome, however, was still poor. An important factor to improve outcome is more timely application of this potentially life-saving procedure. [ABSTRACT FROM AUTHOR]