{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,20]],"date-time":"2026-10-20T17:00:09Z","timestamp":1792515609291,"version":"4.5.0"},"reference-count":47,"publisher":"MDPI AG","issue":"18","license":[{"start":{"date-parts":[[2022,9,14]],"date-time":"2022-09-14T00:00:00Z","timestamp":1663113600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100006334","name":"the Jan Kochanowski University","doi-asserted-by":"publisher","award":["SUPS.RN.22.029"],"award-info":[{"award-number":["SUPS.RN.22.029"]}],"id":[{"id":"10.13039\/501100006334","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["JCM"],"abstract":"<jats:p>COVID-19 causes thromboembolic complications that affect the patient\u2019s prognosis. COVID-19 vaccines significantly improve the prognosis for the course of the infection. The aim of this study was to evaluate the impacts of patient characteristics, including COVID-19 vaccinations, on perioperative mortality in acute coronary syndrome in Poland during the pandemic. We analyzed the data of 243,515 patients from the National Registry of Invasive Cardiology Procedures (Og\u00f3lnopolski Rejestr Procedur Kardiologii Inwazyjnej [ORPKI]). In this group, 7407 patients (21.74%) had COVID-19. The statistical analysis was based on a neural network that was verified by the random forest method. In 2020, the most significant impact on prognosis came from a diagnosis of unstable angina, a short period (&lt;2 h) from pain occurrence to first medical contact, and a history of stroke. In 2021, the most significant factors were pre-hospital cardiac arrest, female sex, and a short period (&lt;2 h) from first medical contact to coronary angiography. After adjusting for a six-week lag, a diagnosis of unstable angina and psoriasis were found to be relevant in the data from 2020, while in 2021, it was the time from the pain occurrence to the first medical contact (2\u201312 h) in non-ST segment elevation myocardial infarction and the time from first contact to balloon inflation (2\u201312 h) in ST-segment elevation myocardial infarction. The number of vaccinations was one of the least significant factors. COVID-19 vaccination does not directly affect perioperative prognosis in patients with acute coronary syndrome.<\/jats:p>","DOI":"10.3390\/jcm11185394","type":"journal-article","created":{"date-parts":[[2022,9,14]],"date-time":"2022-09-14T23:16:36Z","timestamp":1663197396000},"page":"5394","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["The Effect of COVID-19 on the Perioperative Course of Acute Coronary Syndrome in Poland: The Estimation of Perioperative Prognosis and Neural Network Analysis in 243,515 Cases from 2020 to 2021"],"prefix":"10.3390","volume":"11","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-8407-2527","authenticated-orcid":false,"given":"Karol","family":"Kazir\u00f3d-Wolski","sequence":"first","affiliation":[{"name":"Collegium Medicum, Jan Kochanowski University in Kielce, al. IX Wiek\u00f3w Kielc 19A, 25-369 Kielce, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Patrycja","family":"Zaj\u0105c","sequence":"additional","affiliation":[{"name":"The Reumatology Department of the Province Hospital in Konskie, ul. Gimnazjalna 41B, 26-200 Konskie, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5913-3815","authenticated-orcid":false,"given":"Micha\u0142","family":"Zabojszcz","sequence":"additional","affiliation":[{"name":"Collegium Medicum, Jan Kochanowski University in Kielce, al. IX Wiek\u00f3w Kielc 19A, 25-369 Kielce, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Agnieszka","family":"Ko\u0142odziej","sequence":"additional","affiliation":[{"name":"Collegium Medicum, Jan Kochanowski University in Kielce, al. IX Wiek\u00f3w Kielc 19A, 25-369 Kielce, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Janusz","family":"Sielski","sequence":"additional","affiliation":[{"name":"Collegium Medicum, Jan Kochanowski University in Kielce, al. IX Wiek\u00f3w Kielc 19A, 25-369 Kielce, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zbigniew","family":"Siudak","sequence":"additional","affiliation":[{"name":"Collegium Medicum, Jan Kochanowski University in Kielce, al. 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