[The epidemiology of sudden cardiac arrest in prehospital care in the area of the silesian voivodeship].

OBJECTIVE

Introduction: Sudden cardiac arrest (SCA) is a serious medical and social issue. The incidence of SCA varies depending on the location and the circumstances. The aim: A retrospective analysis of non-hospital SCA cases from an epidemiological perspective. The research involved the population monitored by the Voivodeship Rescue Service (VRS) in Katowice.

PATIENTS AND METHODS

Material and methods The analysis covered dispatch order forms and emergency medical procedure forms of the VRS in Katowice in 2016 (n = 249 872). The retrospective analysis involved cases of non-hospital SCA in adults (n = 1603). Quantitative parameters have been presented as average values with standard deviation. Non-metric variables have been described by means of structure indicators. A comparative analysis was conducted by means of the Student's T-test for the quantitative variables and the Pearson's chisquared test for the non-metric variables. The statistical significance adopted for the purpose of all analyses was 0.05.

RESULTS

Results: There were 1005 men (62.7%), 566 women (35.3%) and 32 cases (2.0%) where gender identification was not reported. Female individuals were generally older than male individuals (p = 0.000). Patients' average age was 65.7 years. The SCA attack rate was 59.37/100 000. SCA cases were usually reported in domestic conditions (71.1%, p = 0.000). In a majority of cases, the incident was witnessed by a third person (about 70.0% of cases, p= 0.000). Most of the SCA cases were reported in the first quarter of the year whereas the lowest number of cases was noticed in the third quarter (28.4 % vs 22.5 %). SCA was most frequent during the day. Restoration of spontaneous circulation was reported in 33.4% of the cases.

CONCLUSION

Conclusions: The incidence of SCA is occasional in the context of all analyzed emergency cases in the period under research. However, SCA cases are related with a high risk of failure. Acting according to the currently available knowledge will probably cause an increase of the restoration of spontaneous circulation (ROSC) rate.