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Abstract   Aims  This study aimed to identify echocardiographic determinants of left ventricular thrombus (LVT) formation after acute anterior myocardial infarction (MI).    Methods and results  This case–control study comprised 55 acute anterior MI patients with LVT as cases and 55 acute anterior MI patients without LVT as controls, who were selected from a cohort of consecutive patients with ischemic heart failure in our hospital. The cases and controls were matched for age, sex, and left ventricular ejection fraction. LVT was detected by routine/contrast echocardiography or cardiac magnetic resonance imaging during the first 3 months following MI. Formation of apical aneurysm after MI was independently associated with LVT formation [72.0% vs. 43.5%, odds ratio (OR) = 5.06, 95% confidence interval (CI) 1.65–15.48,  P  = 0.005]. Echocardiographic risk factors associated with LVT formation included reduced mitral annular plane systolic excursion (&lt;7 mm, OR = 4.69, 95% CI 1.84–11.95,  P  = 0.001), moderate–severe diastolic dysfunction (OR = 2.71, 95% CI 1.11–6.57,  P  = 0.028), and right ventricular (RV) dysfunction [reduced tricuspid annular plane systolic excursion &lt; 17 mm (OR = 5.48, 95% CI 2.12–14.13,  P  &lt; 0.001), reduced RV fractional area change &lt; 0.35 (OR = 3.32, 95% CI 1.20–9.18,  P  = 0.021), and enlarged RV mid diameter (per 5 mm increase OR = 1.62, 95% CI 1.12–2.34,  P  = 0.010)]. Reduced tricuspid annular plane systolic excursion (&lt;17 mm) significantly associated with increased risk of LVT in anterior MI patients (OR = 3.84, 95% CI 1.37–10.75,  P  = 0.010), especially in those patients without apical aneurysm (OR = 5.12, 95% CI 1.45–18.08,  P  = 0.011), independent of body mass index, hypertension, anaemia, mitral annular plane systolic excursion, and moderate–severe diastolic dysfunction.    Conclusions  Right ventricular dysfunction as determined by reduced TAPSE or RV fractional area change is independently associated with LVT formation in acute anterior MI patients, especially in the setting of MI patients without the formation of an apical aneurysm. This study suggests that besides assessment of left ventricular abnormalities, assessment of concomitant RV dysfunction is of importance on risk stratification of LVT formation in patients with acute anterior MI.

Echocardiographic risk factors of left ventricular thrombus in patients with acute anterior myocardial infarction