Published June 8, 2022 | Version v1
Journal article Open

Acetylsalicylic acid use is associated with reduced risk of out-of-hospital cardiac arrest in the general population: Real-world data from a population-based study

Description

Abstract

 

Aim

 

Activated blood platelet products facilitate myocardial intracellular Ca2+ overload, thereby provoking afterdepolarizations and increasing susceptibility of ischemic myocardium to ventricular fibrillation (VF). These effects are counteracted in vitro by acetylsalicylic acid (ASA), but no prior study investigated whether ASA is associated with decreased out-of-hospital cardiac arrest (OHCA) risk on a population level. Therefore, we studied whether ASA and other antiplatelet drugs (carbasalate calcium, clopidogrel) are associated with decreased risk of OHCA.

 

Methods

 

We conducted a population-based case-control study among individuals (772 OHCA-cases with documented VT/VF, 2444 non-OHCA-controls) who had used antiplatelet drugs in the year before index-date (OHCA-date), and studied the association between current antiplatelet drug use and OHCA-risk with multivariable logistic regression analysis.

 

Results

 

ASA use was associated with reduced OHCA-risk (adjusted odds ratio (ORadj) 0.6 [0.5–0.8]), and more so in women (ORadj 0.3 [0.2–0.6]) than in men (ORadj 0.7 [0.5–0.95], Pinteraction 0.021). Carbasalate calcium was associated with decreased OHCA-risk in women (ORadj 0.5 [0.3–0.9]), but not in men (ORadj 1.3 [0.96–1.7], Pinteraction 0.005). Clopidogrel was not associated with reduction in OHCA-risk. Risk reduction associated with ASA in patients with OHCA was similar in the presence of acute myocardial infarction (AMI) (ORadj 0.6 [0.4–0.9]) and in the absence of AMI (ORadj 0.7 [0.4–1.2]).

 

Conclusion

 

ASA use was associated with reduced OHCA-risk in both sexes, and more so in women, while carbasalate calcium only protected women. Clopidogrel was not associated with reduced OHCA-risk.

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Additional details

Funding

ESCAPE-NET – European Sudden Cardiac Arrest network: towards Prevention, Education and NEw Treatment 733381
European Commission