Contraction Pattern of the Systemic Right Ventricle
| Autor: | Kai Andersen, Thomas Helle-Valle, Eirik Pettersen, Thor Edvardsen, Bjarne Smevik, Otto A. Smiseth, Hans-Jørgen Smith, Harald Lindberg |
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| Rok vydání: | 2007 |
| Předmět: |
medicine.medical_specialty
Contraction (grammar) medicine.diagnostic_test business.industry Magnetic resonance imaging Anatomy Doppler imaging Free wall medicine.anatomical_structure Ventricle Great arteries Internal medicine Circulatory system medicine Cardiology Ventricular torsion Cardiology and Cardiovascular Medicine business |
| Zdroj: | Journal of the American College of Cardiology. 49:2450-2456 |
| ISSN: | 0735-1097 |
| Popis: | Objectives The aim of the present study was to characterize the contraction pattern of the systemic right ventricle (RV). Background Reduced longitudinal function of the systemic RV compared with the normal RV has been interpreted as ventricular dysfunction. However, longitudinal shortening represents only one aspect of myocardial deformation, and changes in contraction in other dimensions have not previously been described. Methods Fourteen Senning-operated patients age 18.4 ± 0.9 years (mean ± SD) with transposition of the great arteries were studied. We compared the contraction pattern of the systemic RV with findings in the RV and left ventricle (LV) of normal subjects (n = 14) using tissue Doppler imaging and magnetic resonance imaging. Results In the systemic RV free wall, circumferential strain exceeded longitudinal strain (−23.3 ± 3.4% vs. −15.0 ± 3.0%, p Conclusions In the systemic RV as in the normal LV, there was predominant circumferential over longitudinal free wall shortening, opposite from findings in the normal RV. This may represent an adaptive response to the systemic load. Noticeably, however, the systemic RV did not display torsion as found in the normal LV. |
| Databáze: | OpenAIRE |
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