Abstract Background Over the last 20 years, the proportion of young patients admitted for MI has increased. It is unknown whether the 5-year changes in ESC/EAS guidelines and the new SCORE2 can improve the detection and treatment of individuals at risk of premature MI. Purpose To determine how consecutive changes in the ESC/EAS guidelines affected the identification and treatment of young adults premature STEMI. Methods Patients admitted for a first STEMI in the ePARIS between 2010 and 2018 were included (n=2757) and stratified by age categories (<55 y-o; 55–65 y-o; >65 y-o). Using baseline characteristics, we evaluated whether patients in each age group would have been detected as high risk and treated with primary prevention statins before their first STEMI based on the 2021 EAS/ESC guidelines versus 2019 and 2016 guidelines (class I, IIA and IIB recommandations). Eligibility for intensive lipid-lowering therapy in secondary prevention according to age was also assessed. Results Among the 2757 individuals admitted for a first STEMI, 1253 (45,7%) were <55 y.o, 633 (22.9%) were [55–65] and 871 (31.4%) were >65. Only 17% and 18% of young individuals would have been considered as high risk and eligible for primary prevention statins prior to their first STEMI according to 2016 and 2019 EAS/ESC guidelines respectively, compared with individuals aged 55–65 years (41% and 35%) and >65 years old (21% and 72%), p<0.01. Following 2021 ESC guidelines, 62.5% of individuals aged <55 y.o would have been detected as eligible for primary prevention statins, without difference with individuals aged 55 to 65 years old (61.7%) and >65 y.o (62.1%) (figure). At discharge, based on the expected reduction of baseline LDL-C with maximal dose statins and ezetimibe, 47% of patients with premature STEMI would be eligible for PCSK9i compared with 50% and 37% in individuals aged 55–65 y-o and >65 y-o, respectively. Conclusions While 2016 and 2019 ESC guidelines poorly detected young individuals at risk of premature MI, the 2021 ESC guidelines using the new SCORE2 allowed a much better detection of young individuals at risk for a first STEMI. Young patients were also more likely to be eligible for intensive lipid-lowering therapy after their first premature STEMI. Funding Acknowledgement Type of funding sources: None.
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