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[Echocardiography in coronary heart disease]
Insights
Echocardiography detects coronary heart disease by identifying myocardial ischemia or infarction. Two-dimensional (2D) echocardiography reliably assesses left ventricular function abnormalities, aiding in infarct size estimation.
Area of Science:
- Cardiology
- Medical Imaging
- Diagnostic Techniques
Context:
- Coronary heart disease diagnosis relies on detecting myocardial ischemia and infarction.
- Left ventricular function abnormalities are key indicators of cardiac damage.
- Echocardiography offers valuable insights into regional cardiac function.
Purpose:
- To evaluate the efficacy of echocardiography in detecting coronary heart disease.
- To compare the reliability of 2D echocardiography versus TM echocardiography for assessing regional ventricular function.
- To establish echocardiographic criteria for identifying and quantifying myocardial infarction.
Summary:
- Two-dimensional (2D) echocardiography is more reliable than TM echocardiography for detecting regional left ventricular function abnormalities indicative of myocardial ischemia or infarction.
- A segmental scheme and scoring system can document findings and estimate infarct size.
- Echocardiography identifies morphological changes in chronic infarction, including thinning, expansion, and increased reflectivity.
Impact:
- Provides a reliable method for diagnosing coronary heart disease and assessing infarct size.
- Enhances the understanding of regional ventricular dysfunction in myocardial infarction.
- Supports clinical decision-making in managing patients with coronary heart disease and its complications.
Abstract:
Coronary heart disease can be detected via echocardiography, if myocardial ischemia or infarction are present leading to segmental abnormalities of left ventricular function. The capability to demonstrate these regional changes is limited as far as TM echocardiography is concerned, whereas 2D echocardiography is more reliable. For this purpose, cross-sectional imaging of all segments in several planes is necessary. The complex mosaic of findings obtained in this way is best documented by means of a segmental scheme of representative sections. Infarct size then can be estimated by a segmental score. Depressed wall motion and systolic wall thickening are used as criteria for ischaemia and infarction. In the chronic phase, morphological changes can be identified additionally: Thinning, expansion and increased reflectivity of the infarcted areas. In acute myocardial infarction, echocardiography is mainly used if the course is complicated, in the chronic phase, if ECG-changes are questionable, or to evaluate residual ventricular function after large infarcts. Even the TM echocardiogram reliably estimates the ventricular damage caused by the infarct in the chronic phase.