Aim

Slow flow (SF) that develops after percutaneous coronary intervention (PCI) is significantly associated with poor prognosis in Non-ST elevation myocardial infarction (Non-STEMI) patients. Increased Selvester QRS score and Frontal QRS-T angle [f(QRS-T)] are related to adverse cardiovascular outcomes. We aimed to investigate the predictive role of the Selvester QRS score and f(QRS-T) for the development of post-PCI SF in patients with Non-STEMI.

Method and results

In a retrospective study, 210 patients with Non-STEMI were divided into two groups as SF (29) and Non-SF (181) according to their TIMI coronary flow grade. For all patients the Selvester QRS score and f(QRS-T) were calculated from automatic electrocardiography (ECG) reports. The mean age of the study population was 63 (55‐75) years and 102 (68.6%) of patients were male. The Selvester QRS score and f(QRS-T) were higher in the SF group than in the Non-SF group [(5[3–8], 3[2–5]); (67° [42°–88°], 39° [24°–59°]), respectively, all p <0.01]. In a logistic regression analysis, the Selvester QRS score (OR = 4,862; 95% (CI) = 1,131-20,904, p =0.03) and f(QRS-T) (OR = 5,489; 95% (CI)= 11,433-21,034, p =0.01) were found independent predictors of post-PCI SF in Non-STEMI patients. Receiver operating characteristic (ROC) analysis was performed to assess the diagnostic values of the Selvester QRS score [86% sensitivity; 44% specificity; cut off 2; (AUC, 0.693)] and f(QRS-T) [62% sensitivity; 73% specificity; cut off 58°; (AUC, 0.778)].

Conclusion

The Selvester QRS score and f(QRS-T), both easy-to-calculate ECG parameters, are predictors of post-PCI SF in Non-STEMI patients.

中文翻译：

---

非ST段抬高型心肌梗死患者经皮冠状动脉介入治疗后，额QRS-T角和Selvester QRS评分对确定血管造影慢流现象的预测作用

目标

经皮冠状动脉介入治疗 (PCI) 后出现的慢血流 (SF) 与非 ST 段抬高型心肌梗死 (Non-STEMI) 患者的不良预后显着相关。增加的 Selvester QRS 评分和额叶 QRS-T 角 [f(QRS-T)] 与不良心血管结局有关。我们旨在研究 Selvester QRS 评分和 f(QRS-T) 对非 STEMI 患者 PCI 后 SF 发展的预测作用。

方法和结果

在一项回顾性研究中，210 名非 STEMI 患者根据其 TIMI 冠状动脉血流分级分为 SF (29) 和非 SF (181) 两组。对于所有患者，根据自动心电图 (ECG) 报告计算 Selvester QRS 评分和 f(QRS-T)。研究人群的平均年龄为 63 (55-75) 岁，102 (68.6%) 名患者为男性。SF 组的 Selvester QRS 评分和 f(QRS-T) 高于非 SF 组 [(5[3-8], 3[2-5]); （分别为 67° [42°–88°]、39° [24°–59°]），所有 p  <0.01]。在逻辑回归分析中，Selvester QRS 评分（OR = 4,862；95% (CI) = 1,131-20,904，p  = 0.03）和 f(QRS-T)（OR = 5,489；95% (CI)= 11,433-21,034 , p =0.01) 是非 STEMI 患者 PCI 后 SF 的独立预测因子。进行受试者工作特征 (ROC) 分析以评估 Selvester QRS 评分的诊断价值 [86% 敏感性；44% 的特异性；切断2; (AUC, 0.693)] 和 f(QRS-T) [62% 灵敏度；73% 的特异性；切断58°；（AUC，0.778）]。

结论

Selvester QRS 评分和 f(QRS-T) 都是易于计算的 ECG 参数，是非 STEMI 患者 PCI 后 SF 的预测指标。