Relationship Between Inflammatory and Hematological Indices and Coronary Artery Disease Severity and Outcome Among Diabetic Patients Undergoing Primary Percutaneous Coronary Intervention
试验速览
- 阶段
- 不适用
- 状态
- 尚未招募
- 入组人数
- 1,000
- 主要终点
- Incidence of Major Adverse Cardiovascular Events (MACE)
研究概览
简要总结
ST-segment Elevation Myocardial Infarction (STEMI) remains a major cause of mortality despite the adoption of Primary Percutaneous Coronary Intervention (PPCI) as the standard treatment. However, outcomes still vary significantly among patients, especially between diabetic and non-diabetic cohorts.
The research question driving this study is: Can hematologic, inflammatory, and thrombotic indices serve as reliable prognostic tools in predicting the no-reflow phenomenon and coronary artery disease (CAD) severity in STEMI patients, particularly among those with diabetes mellitus?
Recent literature identifies inflammation as a key contributor to the pathogenesis and outcomes of Acute Coronary Syndrome (ACS), including the no-reflow phenomenon and Major Adverse Cardiovascular Events (MACE). Markers such as C-reactive protein (CRP), Neutrophil-to-Albumin Ratio (NAR), Red Cell Distribution Width (RDW), Platelet Distribution Width (PDW), Hemoglobin-to-Red Cell Distribution Width ratio (Hb/RDW), and the RDW/PDW ratio have shown individual correlations with poor outcomes. Emerging indices such as the Systemic Immune-Inflammation Index (SII) and the Systemic Inflammatory Response Index (SIRI) further integrate immune and inflammatory components and have shown promise in early risk stratification.
The current strategy in many cardiac centers relies on angiographic and clinical indicators, which may be insufficient for individualized risk prediction. Hence, incorporating accessible and cost-effective blood-based markers could significantly enhance prognostic accuracy.
The rationale of this research lies in comparing these indices in diabetic versus non-diabetic STEMI patients, aiming to stratify risk, predict no-reflow, assess coronary artery disease burden using the SYNTAX score, and identify those at risk for early adverse outcomes.
详细描述
ST-segment Elevation Myocardial Infarction (STEMI) is a critical form of Acute Coronary Syndrome (ACS), resulting from abrupt plaque rupture and thrombotic coronary occlusion. Despite the widespread application of Primary Percutaneous Coronary Intervention (PPCI), STEMI remains one of the leading causes of mortality. Therefore, early stratification and prediction of outcomes is essential.
Recent evidence highlights that, in addition to thrombosis, inflammation plays a crucial role in the pathophysiology of ACS. This has prompted increasing interest in novel inflammatory and hematological biomarkers as promising prognostic tools. These indices are simple, cost-effective, and clinically relevant for outcome prediction.
The markers evaluated in this study include both inflammatory indices (e.g., C-reactive protein [CRP], Neutrophil-to-Albumin Ratio [NAR]) and thrombotic/hematological indices (e.g., Red Cell Distribution Width [RDW], Platelet Distribution Width [PDW], Hemoglobin-to-Red Cell Distribution Width ratio [Hb/RDW], and RDW/PDW ratio). Some of these have already been established as strong predictors of adverse outcomes in STEMI patients, while others remain under investigation. Moreover, their differential prognostic value in diabetic versus non-diabetic STEMI populations remains an area of ongoing research.
Among the markers for inflammation, C-reactive protein (CRP) has been shown to be strongly associated with increased in-hospital mortality among STEMI patients. Another important marker is the Neutrophil-to-Albumin Ratio (NAR), which combines indicators of systemic inflammation and nutritional status. Higher NAR levels have been linked with poor in-hospital outcomes in STEMI.
This study also evaluates hematological and thrombotic indices. Red Cell Distribution Width (RDW), an indicator of anisocytosis, is a well-studied parameter. Increased RDW levels have been associated with worse outcomes in cardiovascular diseases (CVD) and heart failure. Platelet Distribution Width (PDW)-a marker of platelet activation and heterogeneity-has been identified as a strong independent predictor of the no-reflow phenomenon. An elevated RDW/PDW ratio is thought to represent systemic stress and a prothrombotic state, making it a compelling predictor of poor clinical and angiographic outcomes such as no-reflow.
研究设计
- 研究类型
- Observational
- 观察模型
- Cohort
- 时间视角
- Prospective
入排标准
- 年龄范围
- 18 Years 至 —（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •Patients presenting to Assiut University cardiac catheterization laboratory with ST-segment Elevation Myocardial Infarction (STEMI).
- •Managed with primary percutaneous coronary intervention (PPCI).
排除标准
- •Patients not eligible for PPCI.
- •Patients who underwent thrombolytic therapy or received anti-thrombotics prior to hospital arrival.
- •Prior coronary intervention: history of PCI or CABG.
- •Known hematological disorders:
- •Thalassemia (microcytic anemia, normal iron profile, HbA2 ≥ 3.5% or elevated HbF).
- •Myelodysplastic syndromes (unexplained cytopenias with ≥10% dysplasia in bone marrow aspirate).
- •Leukemia (persistent leukocytosis or pancytopenia, blasts ≥20% in peripheral blood).
- •Active infection or sepsis at admission (e.g., fever, leukocytosis, elevated CRP <100 mg/L without cardiac cause).
- •Known autoimmune or chronic inflammatory diseases (e.g., systemic lupus erythematosus).
- •Known or newly diagnosed malignancy.
- •End-stage renal disease (eGFR <30 ml/min/1.73 m² or on dialysis).
- •Advanced hepatic impairment (Child-Pugh class C; bilirubin >3 mg/dL or ALT/AST >3× upper limit of normal).
- •Recent blood transfusion within 3 months.
- •Recent use of steroids, chemotherapy, or immunosuppressive drugs.
- •Mechanical complications or cardiogenic shock prior to or during STEMI presentation (e.g., papillary muscle rupture, ventricular septal defect, need for intra-aortic balloon pump).
结局指标
主要结局
Incidence of Major Adverse Cardiovascular Events (MACE)
时间窗: Peri-procedural
Composite outcome including heart failure, fatal arrhythmia, death, re-infarction, stroke, and urgent target vessel revascularization. The prognostic value of various biomarkers (Hb/RDW, RDW/PDW, NAR, SII, SIRI) will be assessed in diabetic vs. non-diabetic STEMI patients during admission.
Angiographic outcomes including No Reflow Phenomenon
时间窗: At time of Primary PCI (within 24 hours of admission)
Assessment of angiographic outcomes following primary percutaneous coronary intervention (PPCI), with a specific focus on the incidence of the no-reflow phenomenon. No-reflow will be defined as inadequate myocardial perfusion in the absence of mechanical obstruction.
次要结局
- Incidence of Major Adverse Cardiovascular Events (MACE)(Up to 6 months post-PCI)
研究者
David Emil Efraim Danial
Resident Cardiologist
Assiut University