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Relationship between Serum Inflammatory Biomarkers and Thrombus Characteristics in Patients with ST Segment Elevation
Giampaolo Niccoli1, Alberto Menozzi, Davide Capodanno
1Institute of Cardiology, Catholic University of the Sacred Heart, Rome, Italy.
Insights
Inflammation markers C-reactive protein (CRP) and myeloperoxidase (MPO) reflect different aspects of ST-elevation myocardial infarction (STEMI) thrombi. CRP relates to thrombus burden, while MPO indicates thrombus age, aiding in understanding heart attack pathology.
Area of Science:
- Cardiology
- Biomarkers
- Interventional Cardiology
Background:
- ST-elevation myocardial infarction (STEMI) involves thrombus formation.
- Inflammation plays a role in STEMI pathogenesis.
- Assessing thrombus characteristics is crucial for treatment.
Purpose of the Study:
- To compare angiographic and optical coherence tomography (OCT) findings with thrombus histology in STEMI patients.
- To evaluate the relationship between inflammation markers (CRP and MPO) and thrombus characteristics.
Main Methods:
- The OCTAVIA study enrolled 140 STEMI patients undergoing primary percutaneous intervention.
- Patients underwent OCT, blood sampling for CRP and MPO, and histological thrombus analysis.
- Comparisons were made based on median CRP and MPO thresholds.
Main Results:
- No correlation was found between CRP and MPO levels in STEMI patients.
- High CRP levels were associated with higher thrombus burden and worse TIMI flow.
- High MPO levels were linked to a higher prevalence of early thrombi.
Conclusions:
- CRP and MPO reflect distinct pathogenic mechanisms in STEMI.
- CRP is associated with thrombus burden, while MPO relates to thrombus age.
- These findings enhance understanding of STEMI thrombus composition and inflammation.
Objectives:
To compare angiographic and optical coherence tomography (OCT) data pertinent to thrombi, along with the histologic characteristics of aspirated thrombi in patients presenting with ST elevation myocardial infarction (STEMI) with or without inflammation, as assessed by C-reactive protein (CRP) and myeloperoxidase (MPO).
Methods:
In the OCTAVIA (Optical Coherence Tomography Assessment of Gender Diversity in Primary Angioplasty) study, 140 patients with STEMI referred for primary percutaneous intervention were enrolled. The patients underwent OCT assessment of the culprit vessel, along with blood sampling of CRP and MPO, and histologic analysis of the thrombus.
Results:
Biomarkers were available for 129 patients, and histology and immunohistochemistry of the thrombi were available for 78 patients. Comparisons were made using the median thresholds of CRP and MPO (2.08 mg/L and 604.124 ng/mL, respectively). There was no correlation between CRP and MPO levels in the whole population (p = 0.685). Patients with high CRP levels had higher thrombus grades and more frequent TIMI flow 0/1 compared with those with low CRP levels (5 [1st quartile 3; 3rd quartile 5] vs. 3.5 mg/L [1; 5], p = 0.007, and 69.3 vs. 48.5%, p = 0.04, respectively). Patients with high MPO levels more commonly had early thrombi than had those with low MPO levels (42.5 vs. 20.0%, p = 0.04).
Conclusions:
CRP and MPO were not correlated in STEMI patients, possibly reflecting different pathogenic mechanisms, with CRP more related to thrombus burden and MPO to thrombus age.
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