open access

Vol 67, No 10 (2009)
Other
Published online: 2009-10-29
Submitted: 2012-12-28
Get Citation

Original article
M-mode speckle tracking – a novel echocardiographic approach to assess left ventricular torsional deformation

Łukasz Chrzanowski, Barbara Uznańska, Michał Plewka, Maria Krzemińska-Pakuła, Jarosław Kasprzak
Kardiol Pol 2009;67(10):1070-1076.

open access

Vol 67, No 10 (2009)
Other
Published online: 2009-10-29
Submitted: 2012-12-28

Abstract


Background: Speckle tracking echocardiography (STE) requires special image processing for complex assessment of left ventricular (LV) function, including strain and rotation.
Aim: To evaluate a novel M-mode STE technique as a readily applicable approach, providing potential insights into LV deformation.
Methods: Fifty one patients (mean age 52 ± 14 years, 24 women) with normal or impaired LV function (mean LVEF 51 ± 16%, range between 14% and 66%) were studied. Left ventricular rotation at mitral valve and apical level was measured using dedicated conventional STE software. Grey-scale short axis digital loops at mitral valve level were also used to obtain M-mode STE images, presenting the movement of LV wall speckles along the cursor, with the LV cavity left out. Then, the distance of peak systolic shift (PSS) was measured for one selected speckle.
Results: Mean rotation at mitral valve level was 7.4 ± 3.1°, apical rotation was 7.6 ± 6.4° and LV torsion was 14.9 ± 7.1°. Measurement of PSS with a novel M-mode STE approach was feasible in all patients, producing a mean value of 7 ± 2 mm. Subsequently, two subsets with PSS of less than 7 mm and PSS equal to or above 7 mm showed a significant difference between mean LV torsion of 10.7° and 17.0°, respectively (p = 0.002). In the ROC analysis, PSS cut-off value of less than or equal to 7 mm yielded a sensitivity of 92% and a specificity of 61% to predict LV torsion < 10.7° (p < 0.0001).
Conclusions: M-mode STE appears to be a feasible approach to detect movement of speckles and to measure PSS within the LV inferior and septal wall in short axis view images. PSS cut-off value of less than 7 mm indicates significantly lower LV torsion. Further studies are required to assess the potential role of M-mode STE in cardiac imaging.

Abstract


Background: Speckle tracking echocardiography (STE) requires special image processing for complex assessment of left ventricular (LV) function, including strain and rotation.
Aim: To evaluate a novel M-mode STE technique as a readily applicable approach, providing potential insights into LV deformation.
Methods: Fifty one patients (mean age 52 ± 14 years, 24 women) with normal or impaired LV function (mean LVEF 51 ± 16%, range between 14% and 66%) were studied. Left ventricular rotation at mitral valve and apical level was measured using dedicated conventional STE software. Grey-scale short axis digital loops at mitral valve level were also used to obtain M-mode STE images, presenting the movement of LV wall speckles along the cursor, with the LV cavity left out. Then, the distance of peak systolic shift (PSS) was measured for one selected speckle.
Results: Mean rotation at mitral valve level was 7.4 ± 3.1°, apical rotation was 7.6 ± 6.4° and LV torsion was 14.9 ± 7.1°. Measurement of PSS with a novel M-mode STE approach was feasible in all patients, producing a mean value of 7 ± 2 mm. Subsequently, two subsets with PSS of less than 7 mm and PSS equal to or above 7 mm showed a significant difference between mean LV torsion of 10.7° and 17.0°, respectively (p = 0.002). In the ROC analysis, PSS cut-off value of less than or equal to 7 mm yielded a sensitivity of 92% and a specificity of 61% to predict LV torsion < 10.7° (p < 0.0001).
Conclusions: M-mode STE appears to be a feasible approach to detect movement of speckles and to measure PSS within the LV inferior and septal wall in short axis view images. PSS cut-off value of less than 7 mm indicates significantly lower LV torsion. Further studies are required to assess the potential role of M-mode STE in cardiac imaging.
Get Citation

Keywords

speckle tracking echocardiography; left ventricular rotation; M-mode imaging

About this article
Title

Original article
M-mode speckle tracking – a novel echocardiographic approach to assess left ventricular torsional deformation

Journal

Kardiologia Polska (Polish Heart Journal)

Issue

Vol 67, No 10 (2009)

Pages

1070-1076

Published online

2009-10-29

Bibliographic record

Kardiol Pol 2009;67(10):1070-1076.

Keywords

speckle tracking echocardiography
left ventricular rotation
M-mode imaging

Authors

Łukasz Chrzanowski
Barbara Uznańska
Michał Plewka
Maria Krzemińska-Pakuła
Jarosław Kasprzak

Important: This website uses cookies. More >>

The cookies allow us to identify your computer and find out details about your last visit. They remembering whether you've visited the site before, so that you remain logged in - or to help us work out how many new website visitors we get each month. Most internet browsers accept cookies automatically, but you can change the settings of your browser to erase cookies or prevent automatic acceptance if you prefer.

By "Via Medica sp. z o.o." sp.k., Świętokrzyska 73 street, 80–180 Gdańsk, Poland

tel.:+48 58 320 94 94, faks:+48 58 320 94 60, e-mail: viamedica@viamedica.pl