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Echocardiographic features of mitral annulus calcification
Insights
Echocardiography reveals distinct patterns for mitral annulus calcification (MAC), aiding diagnosis. Recognizing these echocardiographic findings helps differentiate MAC from other cardiac conditions.
Area of Science:
- Cardiology
- Medical Imaging
- Echocardiography
Background:
- Mitral annulus calcification (MAC) is a common finding.
- Distinct echocardiographic patterns associated with MAC are not widely recognized.
- Differentiating MAC from other cardiac abnormalities can be challenging.
Purpose of the Study:
- To describe the characteristic echocardiographic patterns of mitral annulus calcification (MAC).
- To highlight how echocardiography can aid in the diagnosis and differentiation of MAC.
- To emphasize the clinical significance of recognizing MAC on echocardiograms.
Main Methods:
- Retrospective analysis of echocardiograms from ten patients with roentgenographically confirmed mitral annulus calcification (MAC).
- Correlation of echocardiographic findings with cardiac catheterization, intraoperative findings, and pathological data.
- Detailed description of M-mode echocardiographic features, including echo density and mitral valve leaflet motion.
Main Results:
- Distinctive echocardiographic patterns were observed in all ten patients with MAC.
- A dense band of echoes in the mitral annulus region was a consistent finding.
- Echocardiography identified coexisting aortic valve or papillary muscle calcification in some patients.
- Specific echocardiographic findings could mimic other conditions like pericardial effusion or mitral stenosis.
Conclusions:
- Echocardiography is a valuable tool for identifying and characterizing mitral annulus calcification (MAC).
- Recognition of MAC's echocardiographic patterns can prevent misdiagnosis of other cardiac abnormalities.
- Understanding these patterns improves diagnostic accuracy in patients with suspected or confirmed MAC.
Abstract:
Ten patients with roentgenographically demonstrable mitral annulus calcification (MAC) were found to have distinctive echocardiographic patterns. MAC was confirmed at the time of cardiac catheterization in six of these patients. Standard M-mode echocardiograms revealed a dense band of echoes in the region of the mitral annulus in contrast to the thin and delicate echoes generally recorded from the normal mitral annulus. Intraoperative and pathologic confirmation of thickening and calcification limited to the mitral annulus was made in two patients who underwent mitral valve replacement for severe mitral regurgitation due to myxamatous "floppy" valve. Patients with marked MAC may have coexisting aortic valve or papillary muscle calcification which can be recognized by echocardiography. Over-attenuation of left ventricular wall echoes in patients with marked MAC, and reduction in E-F slope of the anterior mitral valve leaflet in others can simulate pericardial effusion and mitral stenosis, respectively. Thus, recognition of MAC can avoid confusion with similar echocardiographic patterns due to other common cardiac abnormalities.