TY - JOUR
T1 - Velocity Vector Imaging in the measurement of left ventricular myocardial mechanics on cardiac magnetic resonance imaging
T2 - Correlations with echocardiographically derived strain values
AU - Williams, Lynne K.
AU - Urbano-Moral, Jose A.
AU - Rowin, Ethan J.
AU - Jamorski, Michal
AU - Bruchal-Garbicz, Beata
AU - Carasso, Shemy
AU - Pandian, Natesa G.
AU - Maron, Martin S.
AU - Rakowski, Harry
PY - 2013/10
Y1 - 2013/10
N2 - Background Regional and global function can be measured by echocardiography using speckle-tracking, a technique that has previously been validated against crystal sonomicrometry. However, the application of Velocity Vector Imaging (VVI) to images obtained from cardiac magnetic resonance (CMR) imaging has never been validated against those values derived from VVI applied to two-dimensional echocardiographic images in the same patient group. The aim of this study was to validate for the first time the application of VVI to retrospectively acquired CMR data sets for the assessment of left ventricular strain and rotation, using echocardiographic strain assessment by VVI as the reference technique. Methods Cine steady-state free precession CMR data sets and two-dimensional echocardiographic images obtained on the same day in 36 adult patients with hypertrophic cardiomyopathy were analyzed retrospectively using VVI to quantify global longitudinal and circumferential strain and rotation parameters. Results The absolute differences in longitudinal strain between the two imaging modalities were -1.1 ± 3.3% (endocardial) and -2.2 ± 3.6% (full thickness). The absolute differences in circumferential strain were -4.& ± 5.3% (endocardial) and -3.4 ± 3.8% (full thickness). CMR consistently resulted in higher strain values than echocardiography. The absolute differences in twist were -0.2 ± 5.6% (endocardial) and 0.1 ± 5.8% (full thickness). Conclusions The application of VVI to CMR data sets allows a feasible and reproducible method for strain analysis in HCM, demonstrating excellent agreement with two-dimensional echocardiography-derived values. Given the superior image quality obtained with CMR in a significant proportion of patients, this technique provides a method for strain assessment without the need for dedicated CMR acquisition and analytic techniques.
AB - Background Regional and global function can be measured by echocardiography using speckle-tracking, a technique that has previously been validated against crystal sonomicrometry. However, the application of Velocity Vector Imaging (VVI) to images obtained from cardiac magnetic resonance (CMR) imaging has never been validated against those values derived from VVI applied to two-dimensional echocardiographic images in the same patient group. The aim of this study was to validate for the first time the application of VVI to retrospectively acquired CMR data sets for the assessment of left ventricular strain and rotation, using echocardiographic strain assessment by VVI as the reference technique. Methods Cine steady-state free precession CMR data sets and two-dimensional echocardiographic images obtained on the same day in 36 adult patients with hypertrophic cardiomyopathy were analyzed retrospectively using VVI to quantify global longitudinal and circumferential strain and rotation parameters. Results The absolute differences in longitudinal strain between the two imaging modalities were -1.1 ± 3.3% (endocardial) and -2.2 ± 3.6% (full thickness). The absolute differences in circumferential strain were -4.& ± 5.3% (endocardial) and -3.4 ± 3.8% (full thickness). CMR consistently resulted in higher strain values than echocardiography. The absolute differences in twist were -0.2 ± 5.6% (endocardial) and 0.1 ± 5.8% (full thickness). Conclusions The application of VVI to CMR data sets allows a feasible and reproducible method for strain analysis in HCM, demonstrating excellent agreement with two-dimensional echocardiography-derived values. Given the superior image quality obtained with CMR in a significant proportion of patients, this technique provides a method for strain assessment without the need for dedicated CMR acquisition and analytic techniques.
KW - Cardiac magnetic resonance
KW - Echocardiography
KW - Hypertrophic cardiomyopathy
KW - Myocardial mechanics
KW - Velocity Vector Imaging
UR - http://www.scopus.com/inward/record.url?scp=84884533139&partnerID=8YFLogxK
U2 - 10.1016/j.echo.2013.06.008
DO - 10.1016/j.echo.2013.06.008
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C2 - 23876996
AN - SCOPUS:84884533139
SN - 0894-7317
VL - 26
SP - 1153
EP - 1162
JO - Journal of the American Society of Echocardiography
JF - Journal of the American Society of Echocardiography
IS - 10
ER -