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Abstract Funding Acknowledgements None. Background Acute Coronary Syndromes (ACS) are the leading cause of mortality in Spain. Further research is needed in order to know risk factors and outcomes in young patients so that medicians could optimize their management and prevention. Purpose Identifying risk factors, clinical characteristics and short-term outcomes in Acute Coronary Syndrome in patients aged 40 and under. Methods A retrospective analysis of patients under 40 years of age who were admitted for ACS, out of 3,859 ACS admissions in Cardiology Intensive Care Unit (CICU) in our hospital between 2012 and 2022. Results 67 patients (1.73%) were included, most of them were males (83.6%). Baseline characteristics are summarized in Table 1. 77.6% had hypertension (HTA), 22.4% had diabetes (DM) and 34.3% had dyslipidemia (DLP). 79.1% were smokers, 9.1% had a history of alcoholism and 29.9% were cocaine users. None of them had a history of stroke, atrial fibrillation (AF). Only 3% had ischemic heart disease. 68.7% of them were ST-elevation myocardial infarction (STEMI) and inferior STEMI was the most common (38.7%). In anterior STEMI (22 patients), 15 had a severe lesion in the mid-left anterior descending artery (LAD), and 6 in the left main stem (LM). Single-vessel disease was the most common (70.8%), with 3-vessel disease in 4.6%. 75.8% received percutaneous coronary intervention (PCI), and 3% underwent bypass surgery. During admission, 10.5% progressed to Killip class III-IV. The ICU mortality was 1.5%. 9% received vasoactive drugs and 4.5% were intubated. Non-invasive ventilation was used in 3% and high-flow nasal cannula oxygen therapy in 5.3%. 3% received intra-aortic balloon pump support and 1.5% underwent dialysis or ultrafiltration. 4.5% received an implantable cardioverter-defibrillator (ICD), although none of them developed bundle branch block or atrioventricular node block, nor AF. After discharge, 11.1% had recurrent ACS, and up to 5.6% underwent PCI again, with a mortality rate of 11.8%. Conclusion Approximately 2% of ACS occur in people younger than 40 years of age. Substance abuse (smoking, cocaine and alcoholism) becomes more prevalent in this group. Prevalence of comorbidities (such as diabetes and nephropathy) are lower, making them less prone to short-term heart failure. However, they are more susceptible to recurrent ischemic events. There is a high incidence of inferior STEMI and LM-STEMI. For these reasons, medicians may need to find out a substance abuse in this group and further research into other risk factors, such as coronary disease family history.Basal characteristicsClinical evolution of patients
Vázquez et al. (Mon,) studied this question.