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Therefore, this research aimed to evaluate the clinical and electrocardiographic correlates of myocardial dysfunction after SARS\u2010CoV\u20102 infection in nonhospitalised patients without previously diagnosed cardiovascular disease. This observational study included 448 patients selected from the database of 4142 patients in the Polish Long\u2010Covid Cardiovascular study. All patients underwent a 12\u2010lead electrocardiogram (ECG); 24\u2010h Holter ECG monitoring, 24\/7 ambulatory blood pressure monitoring, echocardiography, and cardiac magnetic resonance imaging. According to the results of diagnostic tests, patients were divided into two groups depending on the occurrence of myocardial dysfunction after COVID\u201019. Group 1\u2013without myocardial dysfunction after COVID\u201019\u2013consisted of 419 patients, with a mean age of 48.82 (SD\u2009\u00b1\u200911.91), and Group 2 (29 patients)\u2013with myocardial dysfunction after COVID\u201019, with a mean age of 51.45 (SD\u2009\u00b1\u200912.92). When comparing the analysed groups, there were significantly more men in Group 2 (<jats:italic>p<\/jats:italic>\u2009=\u20090.006). QRS (corresponds to the time of ventricular contraction in an electrocardiographic examination) fragmentation (<jats:italic>p<\/jats:italic>\u2009=\u20090.031), arrhythmias (atrial fibrillation, supraventricular extrasystole, ventricular extrasystole) (<jats:italic>p<\/jats:italic>\u2009=\u20090.008), and male gender (<jats:italic>p<\/jats:italic>\u2009=\u20090.007) were independently associated with myocardial dysfunction after COVID\u201019. The study showed that myocardial damage after COVID\u201019 affects men more often and is independent of typical clinical factors and the severity of the disease course. The QRS fragmentation and arrhythmias observed in the ECG indicate the possibility of myocardial dysfunction in patients after COVID\u201019, which may be a valuable marker for physicians.<\/jats:p>","DOI":"10.1002\/jmv.29331","type":"journal-article","created":{"date-parts":[[2023,12,19]],"date-time":"2023-12-19T11:40:43Z","timestamp":1702986043000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":15,"title":["Clinical and electrocardiographic correlates of myocardial dysfunction after COVID\u201019 in nonhospitalised patients in long\u2010term follow\u2010up. 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