Lipoprotein(a) and SARS‐CoV‐2 infections: Susceptibility to infections, ischemic heart disease and thromboembolic events.

Background: Comorbidities including ischemic heart disease (IHD) worsen outcomes after SARS‐CoV‐2 infections. High lipoprotein(a) [Lp(a)] concentrations are a strong risk factor for IHD and possibly for thromboembolic events. We therefore evaluated whether SARS‐CoV‐2 infections modify the risk of high Lp(a) concentrations for IHD or thromboembolic events during the first 8.5 months follow‐up of the pandemic. Method: Cohort study using data from the UK Biobank during the SARS‐CoV‐2 pandemic. Baseline Lp(a) was compared between SARS‐CoV‐2 positive patients and the population controls. Results: SARS‐CoV‐2 positive patients had Lp(a) concentrations similar to the population controls. The risk for IHD increased with higher Lp(a) concentrations in both, the population controls (n = 435,104) and SARS‐CoV‐2 positive patients (n = 6937). The causality of the findings was supported by a genetic risk score for Lp(a). A SARS‐CoV‐2 infection modified the association with a steeper increase in risk for infected patients (interaction p‐value = 0.03). Although SARS‐CoV‐2 positive patients had a five‐times higher frequency of thromboembolic events compared to the population controls (1.53% vs. 0.31%), the risk was not influenced by Lp(a). Conclusions: SARS‐CoV‐2 infections enforce the association between high Lp(a) and IHD but the risk for thromboembolic events is not influenced by Lp(a). [ABSTRACT FROM AUTHOR]