Why the study?
Does the proportion of shockable initial rhythm in out-of-hospital cardiac arrest change over time?
Does the proportion of shockable initial rhythm in out-of-hospital cardiac arrest change over time?
The occurrence of shockable initial rhythms in residential out-of-hospital cardiac arrests has declined over time but recently stabilized, whereas public arrests show a stable rate of shockable rhythms.
Stabilization of shockable rhythms in residential OHCA warrants ongoing surveillance; leaves open whether trends reflect changing demographics or care patterns.
We found a decline in the proportion of patients with a shockable initial rhythm in OHCAs at a residential location; this decline levelled off during the second half of the study period (2011-2015). In public locations, we observed no decline in shockable initial rhythm over time.
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Oving et al. (2020) studied this question.
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