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Comparison of cross-sectional and M-mode multidirectional echocardiography in ischaemic heart disease
Insights
Multidirectional M-mode echocardiography offers sharper definition of left ventricular asynergy in heart disease. Cross-sectional echocardiography provides better spatial orientation for assessing ischemic heart conditions.
Area of Science:
- Cardiology
- Medical Imaging
Background:
- Assessing left ventricular (LV) asynergy is crucial in ischemic heart disease.
- Echocardiography is a primary tool for evaluating cardiac function and regional wall motion abnormalities.
Purpose of the Study:
- To compare cross-sectional and multidirectional M-mode echocardiography for assessing LV asynergic regions.
- To evaluate the effectiveness of these techniques in patients with acute or chronic ischemic heart disease.
Main Methods:
- Cross-sectional and multidirectional M-mode echocardiography were used.
- 13 patients with acute or chronic ischemic heart disease were included.
- Echocardiographic findings were correlated with electrocardiography for infarct site.
Main Results:
- Both techniques showed similar LV short axis diameters (r=0.81).
- Asynergy sites corresponded well between methods and with ECG infarct location.
- Multidirectional M-mode provided sharper definition of asynergic segments and scar tissue differentiation, while cross-sectional offered better spatial orientation.
Conclusions:
- Multidirectional M-mode echocardiography enhances visualization of asynergic segments in ischemic heart disease.
- Cross-sectional echocardiography facilitates spatial orientation of the left ventricle.
- Both techniques have complementary roles in evaluating LV dysfunction post-myocardial infarction.
Abstract:
Cross-sectional and multidirectional M-mode echocardiographic techniques were compared in the assessment of the site and size of asynergic regions of the left ventricle in 13 patients with acute or chronic ischaemic heart disease. The left ventricular short axis diameters measured from the same recording position were similar (r = 0.81). The centre sites of asynergy detected by both echo techniques corresponded well with each other, and with electrocardiographic site of infarction. Regional motion could be analyzed in asynergic left ventricles in 71% of the segments with the cross-sectional technique; in 3 patients no clear images were obtained. The M-mode echoventriculography detected asynergic motion and correctly assessed the presence of scar tissue in 4 patients with old myocardial infarction. With the cross sectional technique this differentiation was not possible. It is concluded that the multidirectional M-mode echocardiography technique gives sharper definition of the asynergic segments in acute or chronic ischaemic heart disease, while the spatial orientation to the left ventricle is more convenient with the cross-sectional technique.