Endothelial stress ratio as a predictor of the no-reflow phenomenon in patients with acute coronary syndrome: a retrospective study
Postepy w Kardiologii Interwencyjnej, vol.22, no.2, pp.211-216, 2026 (SCI-Expanded, Scopus)
- Publication Type: Article / Article
- Volume: 22 Issue: 2
- Publication Date: 2026
- Doi Number: 10.5114/aic.2026.161959
- Journal Name: Postepy w Kardiologii Interwencyjnej
- Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, EMBASE, Directory of Open Access Journals, Academic Search Ultimate (EBSCO), East & Central Europe Database (ProQuest), Biomedical Reference Collection: Corporate Edition (EBSCO), Health Research Premium Collection (ProQuest)
- Page Numbers: pp.211-216
- Keywords: acute coronary syndrome, endothelial stress ratio, inflammation, microvascular dysfunction, no-reflow
- Open Archive Collection: AVESIS Open Access Collection
- Ataturk University Affiliated: Yes
Abstract
Introduction: The no-reflow phenomenon is a major complication in patients with acute coronary syndrome undergoing percutaneous coronary intervention, significantly impacting prognosis. Endothelial dysfunction and systemic inflammation are central to its pathogenesis. Aim: This study aimed to evaluate the predictive value of the endothelial stress ratio – a novel composite index incorporating fibrinogen, albumin, C-reactive protein, and lymphocyte count – for the occurrence of the no-reflow phenomenon in patients with acute coronary syndrome. Material and methods: This retrospective study included 1256 patients with acute coronary syndrome treated with percutaneous coronary intervention. Clinical and procedural data, including Killip class, presentation type, and angiographic findings such as infarct-related artery, multivessel disease, and pre-procedural Thrombolysis in Myocardial Infarction flow, were evaluated. The endothelial stress ratio was calculated using pre-procedural blood samples. To address multicollinearity, two separate multivariate logistic regression models were constructed: Model 1 included the fibrinogen-to-albumin ratio, while Model 2 evaluated the independent predictive value of the endothelial stress ratio alongside clinical variables. Results: The no-reflow phenomenon occurred in 73 (5.8%) patients. Patients with no-reflow had significantly higher endothelial stress ratio values (138 (102–198) versus 72 (49–104), p < 0.001). In multivariate analysis, the endothelial stress ratio was the strongest independent predictor of no-reflow (Model 2, odds ratio: 1.48, 95% confidence interval: 1.21–1.82, p < 0.001). Receiver operating characteristic analysis demonstrated a strong discriminative performance, with an area under the curve of 0.82 (p < 0.001). Conclusions: The endothelial stress ratio is a novel, independent biomarker for predicting no-reflow. Incorporating this ratio into pre-procedural assessment may help identify high-risk patients and guide therapeutic strategies.