Left ventricular mechanics in idiopathic dilated cardiomyopathy: systolic-diastolic coupling and torsion
Language English Country United States Media print-electronic
Document type Journal Article, Research Support, Non-U.S. Gov't
PubMed
19345064
DOI
10.1016/j.echo.2009.02.022
PII: S0894-7317(09)00191-6
Knihovny.cz E-resources
- MeSH
- Cardiomyopathy, Dilated complications diagnostic imaging MeSH
- Echocardiography, Doppler methods MeSH
- Adult MeSH
- Ventricular Dysfunction, Left complications diagnostic imaging MeSH
- Elasticity Imaging Techniques methods MeSH
- Middle Aged MeSH
- Humans MeSH
- Torsion Abnormality complications diagnostic imaging MeSH
- Check Tag
- Adult MeSH
- Middle Aged MeSH
- Humans MeSH
- Male MeSH
- Female MeSH
- Publication type
- Journal Article MeSH
- Research Support, Non-U.S. Gov't MeSH
BACKGROUND: In idiopathic dilated cardiomyopathy (IDC), myocardial deformational parameters and their mutual relationships remain incompletely characterized. METHODS: Thirty-seven patients with IDC underwent two-dimensional speckle-tracking echocardiography (2D-STE) to assess left ventricular rotation, torsion, and longitudinal, circumferential, and radial systolic and diastolic strains and strain rates. Additionally, 2D-STE was performed in 14 controls. RESULTS: All deformational parameters on 2D-STE were significantly lower in patients with IDC compared with controls. Seven patients exhibited opposite basal (positive, counterclockwise) and 11 patients exhibited opposite apical (negative, clockwise) rotation at end-systole. Circumferential, radial, and longitudinal early diastolic strain rates were correlated most strongly with the corresponding spatial components of systolic deformation. CONCLUSION: In patients IDC, all torsional, systolic, and diastolic deformational parameters were decreased. Corresponding three-dimensional components of systolic and diastolic deformations were closely coupled. Considerable variation in the direction of basal and apical rotation exists in a subset of patients with IDC.
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