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Clinical Characteristics and Risk Factors of Left Ventricular Thrombus after Acute Myocardial Infarction: A Matched

Yue-Xin Jiang, Lin-De Jing, You-Hong Jia1

  • 1Key Laboratory of Clinical Trial Research in Cardiovascular Drugs, Ministry of Health, State Key Laboratory of Cardiovascular Diseases, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, China.

Chinese Medical Journal
|September 15, 2015
PubMed

Insights

Left ventricular thrombus (LVT) is a common complication after acute myocardial infarction (AMI). Lower ejection fraction, anterior MI, severe wall motion abnormalities, and left ventricular aneurysm are key risk factors for LVT.

Area of Science:

  • Cardiology
  • Clinical Medicine
  • Medical Research

Background:

  • Left ventricular thrombus (LVT) is a recognized complication in acute myocardial infarction (AMI) patients.
  • LVT poses a risk of systemic embolism.
  • Understanding LVT prevalence and risk factors post-AMI is crucial for clinical management.

Purpose of the Study:

  • To determine the incidence of LVT in AMI patients.
  • To evaluate the clinical characteristics associated with LVT.
  • To identify independent risk factors for LVT development after AMI.

Main Methods:

  • Retrospective analysis of 13,732 AMI patients (excluding non-ST elevation MI) from electronic medical records (2003-2013).
  • 96 LVT cases were compared with 192 matched controls without LVT.
  • Conditional logistic regression (Cox model) was employed to identify independent risk factors.

Main Results:

  • The incidence of LVT post-AMI was found to be 0.7%.
  • Univariate analysis linked anterior MI, reduced left ventricular ejection fraction (LVEF ≤40%), severe regional wall motion abnormalities (RWMA), pericardial effusion, and left ventricular aneurysm to LVT.
  • Independent risk factors identified: lower LVEF (OR 0.891), extensive anterior MI (OR 6.403), severe RWMA (OR 7.348), and left ventricular aneurysm (OR 6.955).

Conclusions:

  • Lower LVEF, extensive anterior MI, severe RWMA, and left ventricular aneurysm are significant independent risk factors for LVT following AMI.
  • The study highlights the need for enhanced diagnostic strategies for LVT in AMI patients.
  • Further research is warranted to improve LVT detection and management post-myocardial infarction.
Abstract

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