Analysis of laboratory and instrumental data in young patients with COVID-19 and cardiovascular disorders

Introduction. Despite significant information on cardiovascular damage in older patients with COVID- 19, there is no clear understanding of the variability of cardiac diseases manifestations in young patients. Additionally, summarized data characterizing the severity of myocardial damage in these patients is lacking.
Aim. To compare laboratory and functional study data and identify predictors of cardiovascular damage in young patients with COVID-19.
Materials and methods. An analysis of 4,453 medical records from 2020 to 2022 was conducted. The focus was on patient age (18- 44 years), primary diagnosis, severity of COVID-19, comorbid conditions, timing of cardiovascular symptom onset, and laboratory and functional study data characterizing cardiovascular system damage. According to the inclusion and exclusion criteria, 132 medical records of patients aged 18 to 44 years with moderate COVID-19 were selected, including 49 with cardiovascular issues and 83 without cardiovascular pathology.
Results. Comparative analysis showed that cardiovascular system damage in young patients with moderate COVID-19, compared to those without cardiovascular pathology, was associated with elevated levels of C-reactive protein (CRP) (p=0.001), brain natriuretic peptide (NTproBNP) (p<0.0001), D-dimer (p<0.0001), and troponin I (p<0.0001). CRP levels in patients with pericarditis and acute myocardial infarction (AMI) were higher than in those with acute cerebrovascular accident (ACVA) (p=0.001). No differences in D-dimer levels were found between subgroups (p>0.05). Troponin I and NTproBNP levels in the AMI subgroup were higher than in the pericarditis (p<0.0001 and p=0.047, respectively) and ACVA (p=0.001 and p=0.043, respectively) subgroups. Patients with cardiovascular disorders had a reduced left ventricular ejection fraction (LVEF) (p=0.005) without significant changes in left ventricular end-systolic (p=0.200) and end-diastolic volumes (p=0.119). The lowest LVEF was found in the AMI and ACVA subgroups (p=0.001). Correlation-regression analysis revealed associations between cardiovascular complications and NTproBNP (r=0.673, p<0.001), troponin I (r=0.543, p<0.001), and D-dimer (r=0.363, p<0.001), as well as LVEF (r=-0.341, p<0.001). Significant stochastic relationships were also found between D-dimer and troponin I (r=0.532, p<0.001), NTproBNP (r=0.545, p<0.001); and between LVEF and troponin I (r=-0.420, p<0.001), NTproBNP (r=-0.314, p<0.001). Multivariate regression analysis showed that NTproBNP, with a sensitivity of 86.5% and specificity of 81.9%, is an independent predictor of cardiovascular complications in young patients with moderate COVID-19 (OR=1.175, p=0.001).
Conclusion. The results indicate that the severity of COVID-19, regardless of patient age and comorbidities, can be a factor in the development of cardiovascular complications. NTproBNP levels in the blood of COVID-19 patients can be an early marker of cardiovascular risk. However, further research is needed to confirm the pathogenetic role of cardiotropic protein in the development of pericarditis, AMI, and ACVA in these patients.

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