Incidence and Risk Factors of Left Ventricular Thrombus in Acute ST-Segment Elevation Myocardial Infarction Treated by Primary Percutaneous Coronary Intervention: A Meta-Analysis
Pei Wang1, Xudong Ye2, Dongdong Yan3
1The First Clinical Medical College of Lanzhou University, Lanzhou, China, pwang1996@163.com.
Insights
Left ventricular thrombosis (LVT) occurs in 4% of ST-segment elevation myocardial infarction (STEMI) patients after primary percutaneous coronary intervention (PCI). Anterior STEMI and reduced left ventricular ejection fraction are key risk factors for LVT.
Area of Science:
- Cardiology
- Interventional Cardiology
Background:
- Left ventricular thrombosis (LVT) is a significant complication following acute ST-segment elevation myocardial infarction (STEMI).
- Primary percutaneous coronary intervention (PCI) is the standard treatment for STEMI, but LVT remains a concern.
- Understanding the incidence and risk factors of LVT post-PCI is crucial for patient management.
Approach:
- A comprehensive meta-analysis was conducted, searching major databases (PubMed, Embase, Cochrane Library, Web of Science) for studies from 2001 to 2022.
- Utilized random-effects and fixed-effects models to estimate pooled incidence, mean difference (MD), and odds ratios (OR) with 95% confidence intervals (CI).
- Review Manager 5.4 software facilitated the meta-analysis process.
Key Points:
- The overall incidence of LVT in STEMI patients undergoing primary PCI was found to be 4%.
- Anterior STEMI showed a significantly higher incidence of LVT (10.0%).
- Identified risk factors for LVT include anterior STEMI (OR=11.93), left anterior descending-related infarct (OR=6.85), left ventricular wall motion abnormalities (OR=7.53), and lower post-PCI left ventricular ejection fraction (LVEF) (MD=13.78).
Conclusions:
- The incidence of LVT after acute STEMI in the PCI era remains substantial.
- This meta-analysis provides critical insights into patient populations at higher risk for post-PCI LVT.
- Findings can inform the design of future prospective randomized controlled trials for LVT prevention and management.
Objective:
Left ventricular thrombosis (LVT) is a common complication of acute ST-segment elevation myocardial infarction (STEMI). This study attempted to synthesize the available evidence to understand the incidence and risk factors of LVT in acute STEMI patients undergoing primary percutaneous coronary intervention (PCI).
Methods:
We searched PubMed, Embase, Cochrane Library, and Web of Science for studies published from January 2001 to January 2022. The random-effects and fixed-effects model meta-analysis estimated pooled incidence, mean difference (MD), odds ratio (OR), and 95% confidence interval (CI). The Review Manager 5.4 software was used for meta-analysis performance.
Results:
The results of meta-analysis showed that the incidence of LVT in acute STEMI treated by primary PCI was 4% (95% CI [0.03, 0.05]), and the overall pooled incidence in patients with anterior STEMI was 10.0% (95% CI [0.07, 0.12]). Anterior STEMI (OR = 11.93, 95% CI [6.25, 22.78], p = 0.0003), left anterior descending-related infarct (OR = 6.85, 95% CI [3.70, 12.66], p < 0.00001), left ventricular wall motion abnormalities (OR = 7.53, 95% CI [3.18, 17.82], p < 0.00001), and lower post-PCI LVEF (MD = 13.78, 95% CI [12.15, 15.41], p < 0.00001) were risk factors for post-PCI LVT.
Conclusion:
The incidence of LVT after acute STEMI in the PCI era remains high. This study provides a preliminary overview of STEMI patients at risk for post-PCI LVT and will help the design of prospective randomized controlled trials for the management and prevention of LVT.
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