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Background: Although cardiac catheterizations are less invasive compared to cardiac surgical procedures, they have few-er complications, and patients recover faster after them, they are not without complications. With our research, we wanted to identify the population’s characteristics, the most common pathologies, types of catheterizations, and complications during catheterizations in our centre, and identify possible risk factors.Methods: We collected data on all pediatric cardiac catheterizations performed between June 2018 and August 2021. We defined them according to the type of catheterization (diagnostic and therapeutic), weight, age, and sex of the patients, and complexity of pathology. Complications were divided into major and minor, and using the Pearson chi-square test and the Mann-Whitney U test, we determined their correlation with the possible risk factors.Results: During the mentioned period, 191 cardiac catheterizations (54 diagnostic and 137 therapeutic) were performed in 175 children, of which 95 were boys, and 80 were girls. The children were between a few hours and 18 years old and weighed between 2.6 kg and 85.5 kg. We recorded 9 complications; 5 were major and 4 were minor. With our research, we did not demonstrate a statistically significant relationship between risk factors (body weight, sex, type of catheterization, age of patients, complexity of pathology) and the occurrence of complications.Conclusion: Most catheterizations were performed in children aged between 1 and 10 years and those weighing between 10 and 40 kg. Slightly more catheterizations were performed in boys; the most frequent were therapeutic catheterizations. The incidence of complications in our centre is comparable to other centres. In our centre, we did not determine the correlation between body weight, sex, type of catheterization, age, the complexity of the pathology, and the incidence of complications.