Incidence and Risk Factors of Left Ventricular Thrombus in Acute ST-Segment Elevation Myocardial Infarction Treated

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.
Abstract

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