Correspondence of Myocardial Strain with Torrent-Guasp’s Theory. Contributions of New Echocardiographic Parameters
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| Format: | Artículo científico |
| Langue: | en |
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Sociedad Argentina de Cardiología
2016
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| _version_ | 1876450812998189056 |
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| author | Vicente Mora |
| author_facet | Vicente Mora |
| contents | Correspondence of Myocardial Strain with Torrent-Guasp’s Theory. Contributions of New Echocardiographic Parameters Vicente Mora Idelfonso Roldán Assumpció Saurí Rubén Fernández-Galera Marta Monteagudo Helena Romero Claudia Cabadés Juan A. Cosín Jorge C. Trainini Jorge A. Lowenstein Medicina Left methods physiology Echocardiography Ventricular Function Background: Strain, assessed by speckle tracking echocardiography, may be used to evaluate left ventricular mechanics and could establish reference values together with new indices of myocardial function. Objective: The aim of this study was to demonstrate the correspondence of echocardiographic strain values with Torrent-Guasp’s single band theory. Methods: A prospective observational study was conducted in 54 healthy volunteers. The three apical projections were used to de- termine longitudinal strain. Radial strain, circumferential strain and rotation were assessed in transverse planes at the level of the mitral valve, the papillary muscles and the apex. Results: Mean age was 52±10.1 years. Global left ventricular longitudinal strain was -20.8%±2.4%. Post-systolic longitudinal strain mainly affects interventricular septal segments. Radial strain was 36.5%±10.7%, with basal values prevailing over apical ones, extending its duration to the early phase of diastole. Circumferential strain was -20.8%±3.8%, with larger values towards the apex. Twist was 18.4º±6º, torsion 2.2º±0.8º/cm and the torsion index (twist/mitral annular plane systolic excursion) 13.1º±4.4º/cm. The combined strain index includes the “strain product” (-387º±147º × %), and the “strain index” (-0.9º±0.3º/%) calculated as twist × longitudinal strain and twist/longitudinal strain, respectively. Conclusions: New strain parameters may be useful in the study of ventricular mechanics. The anatomical arrangement described by the myocardial band theory is echocardiographically supported by the presence of larger radial strain at the basal-medial level (prevalence of transverse fibers), while the variable arrangement of oblique fibers are responsible for longitudinal strain, circumfer- ential strain and ventricular torsion. 2016 artículo científico 0034-7000 https://www.redalyc.org/articulo.oa?id=305350076008 en http://www.redalyc.org/revista.oa?id=3053 Revista Argentina de Cardiología application/pdf Sociedad Argentina de Cardiología Revista Argentina de Cardiología (Argentina) Num.6 Vol.84 |
| format | Artículo científico |
| id | redalyc_305350076008 |
| institution | Redalyc |
| language | en |
| publishDate | 2016 |
| publisher | Sociedad Argentina de Cardiología |
| spellingShingle | Correspondence of Myocardial Strain with Torrent-Guasp’s Theory. Contributions of New Echocardiographic Parameters Vicente Mora Medicina Left methods physiology Echocardiography Ventricular Function Correspondence of Myocardial Strain with Torrent-Guasp’s Theory. Contributions of New Echocardiographic Parameters Vicente Mora Idelfonso Roldán Assumpció Saurí Rubén Fernández-Galera Marta Monteagudo Helena Romero Claudia Cabadés Juan A. Cosín Jorge C. Trainini Jorge A. Lowenstein Medicina Left methods physiology Echocardiography Ventricular Function Background: Strain, assessed by speckle tracking echocardiography, may be used to evaluate left ventricular mechanics and could establish reference values together with new indices of myocardial function. Objective: The aim of this study was to demonstrate the correspondence of echocardiographic strain values with Torrent-Guasp’s single band theory. Methods: A prospective observational study was conducted in 54 healthy volunteers. The three apical projections were used to de- termine longitudinal strain. Radial strain, circumferential strain and rotation were assessed in transverse planes at the level of the mitral valve, the papillary muscles and the apex. Results: Mean age was 52±10.1 years. Global left ventricular longitudinal strain was -20.8%±2.4%. Post-systolic longitudinal strain mainly affects interventricular septal segments. Radial strain was 36.5%±10.7%, with basal values prevailing over apical ones, extending its duration to the early phase of diastole. Circumferential strain was -20.8%±3.8%, with larger values towards the apex. Twist was 18.4º±6º, torsion 2.2º±0.8º/cm and the torsion index (twist/mitral annular plane systolic excursion) 13.1º±4.4º/cm. The combined strain index includes the “strain product” (-387º±147º × %), and the “strain index” (-0.9º±0.3º/%) calculated as twist × longitudinal strain and twist/longitudinal strain, respectively. Conclusions: New strain parameters may be useful in the study of ventricular mechanics. The anatomical arrangement described by the myocardial band theory is echocardiographically supported by the presence of larger radial strain at the basal-medial level (prevalence of transverse fibers), while the variable arrangement of oblique fibers are responsible for longitudinal strain, circumfer- ential strain and ventricular torsion. 2016 artículo científico 0034-7000 https://www.redalyc.org/articulo.oa?id=305350076008 en http://www.redalyc.org/revista.oa?id=3053 Revista Argentina de Cardiología application/pdf Sociedad Argentina de Cardiología Revista Argentina de Cardiología (Argentina) Num.6 Vol.84 |
| title | Correspondence of Myocardial Strain with Torrent-Guasp’s Theory. Contributions of New Echocardiographic Parameters |
| topic | Medicina Left methods physiology Echocardiography Ventricular Function |
| url | https://www.redalyc.org/articulo.oa?id=305350076008 |