Background: Endovascular stenting for atherosclerotic stenosis in the intra- and extracranial arteries is a minimally invasive procedure, but comprehensive studies on long-term complications following COVID-19 infection are lacking. Given the potential for increased rates of stent thrombosis, stroke, myocardial infarction, and mortality among COVID-19 patients, understanding the long-term outcomes of stenting for extra- and intracranial atherosclerotic stenosis is crucial for public health. This study addresses the dearth of extensive research on the long-term adverse outcomes associated with endovascular stenting procedures in patients who have experienced atherosclerotic stenosis in intracranial and extracranial arteries following COVID-19 infection. Methods: This retrospective study analyzed data from a tertiary hospital database, focusing on individuals who underwent extracranial or intracranial atherosclerotic stenting procedures at the Central Clinical Hospital JSC, Department of Neurosurgery, between 2016 and 2017, before the COVID-19 pandemic. The primary outcome measures to be evaluated include the incidence of stent thrombosis, ischemic stroke, myocardial infarction, and all-cause mortality. Results: The study followed 93 patients via telephone survey, but 12 did not respond, leaving 81 participants. Of these, 32 reported a prior COVID-19 infection confirmed by PCR testing, forming the COVID-19 group. The remaining 49 without confirmed COVID-19 infection comprised the control group. The 81 participants included 32 in the COVID-19 group and 49 in the control group, with no statistically significant differences in sex or age between the two cohorts. The binary logistic regression analysis revealed that the number of cigarettes smoked per day was a statistically significant predictor of myocardial infarction. This risk factor accounted for 23.6% of the observed myocardial infarctions, demonstrating a direct relationship between the number of cigarettes smoked and the probability of experiencing a myocardial infarction. Conclusion: The study found no significant differences in mortality, stroke, and heart attack rates between the COVID-19 and control groups. However, high blood pressure, heavy smoking, and high stress were linked to worse long-term outcomes.