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Published on: April 25, 2014
Assessment of postoperative prognosis in patients with acute ST-segment elevation myocardial infarction after PCI
Jingwen Guan1, Yikang Xu1, Limin Liu1
1Cardiology Department, The Second Affiliated Hospital of Shenyang Medical College, Shenyang, China.
Insights
Low-density lipoprotein receptor-related protein 1 (LRP1) expression is lower in ST-segment elevation myocardial infarction (STEMI) patients. Higher LRP1 levels predict major adverse cardiovascular events (MACE) after percutaneous coronary intervention (PCI).
Area of Science:
- Cardiovascular Medicine
- Biomarker Discovery
- Interventional Cardiology
Background:
- ST-segment elevation myocardial infarction (STEMI) is a critical condition requiring timely intervention.
- Identifying reliable prognostic markers is crucial for managing STEMI patients post-percutaneous coronary intervention (PCI).
- Low-density lipoprotein receptor-related protein 1 (LRP1) is a cell surface receptor with potential roles in cardiovascular health.
Purpose of the Study:
- To investigate the prognostic significance of Low-density lipoprotein receptor-related protein 1 (LRP1) expression.
- To assess the association between LRP1 levels and major adverse cardiovascular events (MACE) in STEMI patients undergoing PCI.
Main Methods:
- Prospective study involving 96 STEMI patients and 19 controls.
- Quantification of LRP1 expression in coronary blood via real-time quantitative PCR (qPCR).
- Stratification of STEMI patients into tertiles based on LRP1 expression.
- Six-month follow-up to record MACE.
Main Results:
- Significantly lower LRP1 expression was observed in STEMI patients compared to controls (P < 0.05).
- A positive correlation was found between LRP1 levels and MACE incidence, with the highest MACE rate in the high LRP1 group (41.9%) compared to the low LRP1 group (6.7%) (P < 0.05).
- LRP1 expression correlated positively with NT-proBNP and cTnT, and negatively with LVEF.
- An LRP1 expression threshold of 0.79 demonstrated 81.8% sensitivity and 70% specificity for predicting 6-month MACE (AUC = 0.789).
Conclusions:
- LRP1 expression is a potential independent predictor of MACE in STEMI patients.
- LRP1 may serve as a valuable prognostic biomarker for short-term outcomes following PCI in STEMI.
- Further research is warranted to elucidate the precise role of LRP1 in STEMI pathophysiology and its clinical utility.
Purpose:
To evaluate the prognostic value of Low-density lipoprotein receptor-related protein 1 (LRP1) in patients with acute ST-segment elevation myocardial infarction (STEMI) following percutaneous coronary intervention (PCI).
Method:
This prospective study included 96 STEMI patients who underwent PCI and 19 control subjects with normal coronary arteries. Coronary blood was taken from both groups, and LRP1 expression levels were quantified using real-time quantitative PCR (qPCR). The STEMI patients were stratified into low, middle, and high LRP1 groups based on tertiles of LRP1 expression. The primary endpoint was the occurrence of major adverse cardiovascular events (MACE) during a six-month follow-up period post-PCI.
Results:
LRP1 expression in arterial blood was significantly lower in the STEMI group [0.63(0.23,1.1)] compared to the control group [1.5(0.84,1.85)] (P < 0.05). The incidence of MACE showed an increasing trend across the LRP1 tertiles: 6.7% (95% CI: 1.9-21.3%) in the low LRP1 group, 22.6% (95% CI: 11.4-39.8%) in the middle LRP1 group, and 41.9% (95% CI: 26.4-59.2%) in the high LRP1 group. The high LRP1 group exhibited a significantly higher MACE rate compared to the low LRP1 group (P < 0.05). Spearman's rank correlation analysis revealed positive correlations between LRP1 and both NT-proBNP and cTnT (r = 0.349, 95% CI: 0.156-0.515, P < 0.001; r = 0.328, 95% CI: 0.133-0.497, P = 0.001, respectively), and a negative correlation with LVEF values (r = -0.285, 95% CI: -0.460 to -0.087, P = 0.006). Receiver operating characteristic (ROC) analysis identified an LRP1 expression threshold of 0.79 for predicting MACE within six months post-PCI, with a sensitivity of 81.8% (95% CI: 61.5-92.7%), a specificity of 70% (95% CI: 58.5-79.5%), and an area under the curve (AUC) of 0.789 (95% CI: 0.688-0.890, P < 0.001).
Conclusion:
LRP1 expression appears to be an independent predictor of MACE in STEMI patients and may have prognostic value for short-term outcomes following PCI.
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