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Prediction of apical thrombus formation in acute myocardial infarction based on left ventricular spatial flow pattern
B J Delemarre1, C A Visser, H Bot
1Department of Cardiology, Academic Medical Center, Amsterdam, The Netherlands.
Insights
A normal left ventricular spatial flow pattern in acute myocardial infarction patients predicts no thrombus formation. Abnormal patterns may normalize, but persistent abnormalities indicate a higher risk of thrombus development.
Area of Science:
- Cardiology
- Medical Imaging
- Echocardiography
Background:
- Thrombus formation is a significant complication in acute myocardial infarction.
- Left ventricular spatial flow patterns may offer predictive insights into thrombus development.
Purpose of the Study:
- To determine the predictive value of left ventricular spatial flow patterns for thrombus formation in acute myocardial infarction patients.
- To assess the association between normal and abnormal flow patterns and subsequent thrombus development.
Main Methods:
- Pulsed Doppler echocardiography was used to assess left ventricular spatial flow patterns in 62 acute myocardial infarction patients.
- Flow patterns were evaluated within 24 hours, 6 weeks, and 12 weeks post-onset of symptoms.
- Criteria for normal flow included simultaneous mitral valve and apical blood motion onset and discontinuous Doppler signals along specific ventricular walls.
Main Results:
- A normal flow pattern at initial assessment in 46 patients was associated with zero thrombus formation during follow-up.
- Among 16 patients with abnormal initial flow patterns, 6 normalized and developed no thrombus.
- Persistent abnormal flow patterns in 10 patients led to thrombus formation in 7.
Conclusions:
- A normal left ventricular spatial flow pattern effectively predicts the absence of thrombus formation in acute myocardial infarction.
- Persistent abnormal flow patterns are linked to an increased risk of thrombus development.
- These findings may inform decisions regarding anticoagulation therapy in acute myocardial infarction.
Abstract:
The predictive value of the left ventricular spatial flow pattern for thrombus formation was determined in 62 patients with acute myocardial infarction. A normal flow pattern by pulsed Doppler echocardiography was characterized by 1) simultaneous onset of blood motion at the mitral valve and apical level, and 2) a discontinuous Doppler signal along the lateral wall and interventricular septum. The flow pattern was assessed by these criteria, within 24 h after the onset of complaints and after 6 and 12 weeks. In 46 of the 62 patients, a normal flow pattern was found at the first examination; none of these 46 patients developed a thrombus during the study period. An abnormal flow pattern was seen at the first examination in 16 patients; this pattern normalized during follow-up in 6 patients, none of whom developed a thrombus. In the other 10 patients the abnormal flow pattern persisted, and 7 of these developed a thrombus. These findings suggest that a normal left ventricular flow pattern in the setting of acute myocardial infarction is not associated with subsequent thrombus formation. This observation may be of importance if anticoagulation is considered.