TY - JOUR
T1 - Reduced long axis strain is associated with heart failure and cardiovascular events in the multi-ethnic study of Atherosclerosis
AU - Gjesdal, Ola
AU - Yoneyama, Kihei
AU - Mewton, Nathan
AU - Wu, Colin
AU - Gomes, Antoinette S.
AU - Hundley, Gregory
AU - Prince, Martin
AU - Shea, Steven
AU - Liu, Kiang
AU - Bluemke, David A.
AU - Lima, Joao A.C.
N1 - Publisher Copyright:
© 2016 Wiley Periodicals, Inc.
PY - 2016/7/1
Y1 - 2016/7/1
N2 - Purpose: To propose long axis strain (LAS), a novel index of global left ventricle (LV) function, as a sensitive and powerful predictor of hard cardiovascular events and heart failure in the Multi-Ethnic Study of Atherosclerosis (MESA). Materials and Methods: Strain is an index of relative myocardial deformation, and enables normalization for differences in heart size. Measurement of strain conventionally requires dedicated software and protocols for image acquisition. LAS, however, can be analyzed using a caliper tool from conventional LV long axis magnetic resonance imaging (MRI) cine loops, reflecting the average myocardial contraction in the longitudinal direction. In all, 1651 participants (53% men) of the MESA study, without a history of myocardial infarction or heart failure, were assessed using conventional cine MR images. LV lengths were assessed at end-diastole (EDL) and end-systole (ESL), and LAS was calculated as 100*(EDL-ESL)/EDL. Participants were followed for 6.8 ± 1.8 years for a composite endpoint of congestive heart failure or hard cardiovascular events, and the predictive ability of LAS was tested, unadjusted and adjusted for established cardiovascular risk factors. Results: A total of 114 events were observed. Mean LAS was 11.7 ± 2.5% and 10.0 ± 2.7% in participants without and with events, respectively (P < 0.001). Increased LAS reduced the hazard ratio to 0.75 for univariate, and 0.88 for multivariate assessments, respectively (both P < 0.001). Conclusion: Assessment of long axis LV deformation by LAS is feasible and reproducible. Moreover, LAS predicts hard cardiovascular events and congestive heart failure in a multi-ethnic population without overt cardiovascular disease at inclusion. J. Magn. Reson. Imaging 2016;44:178–185.
AB - Purpose: To propose long axis strain (LAS), a novel index of global left ventricle (LV) function, as a sensitive and powerful predictor of hard cardiovascular events and heart failure in the Multi-Ethnic Study of Atherosclerosis (MESA). Materials and Methods: Strain is an index of relative myocardial deformation, and enables normalization for differences in heart size. Measurement of strain conventionally requires dedicated software and protocols for image acquisition. LAS, however, can be analyzed using a caliper tool from conventional LV long axis magnetic resonance imaging (MRI) cine loops, reflecting the average myocardial contraction in the longitudinal direction. In all, 1651 participants (53% men) of the MESA study, without a history of myocardial infarction or heart failure, were assessed using conventional cine MR images. LV lengths were assessed at end-diastole (EDL) and end-systole (ESL), and LAS was calculated as 100*(EDL-ESL)/EDL. Participants were followed for 6.8 ± 1.8 years for a composite endpoint of congestive heart failure or hard cardiovascular events, and the predictive ability of LAS was tested, unadjusted and adjusted for established cardiovascular risk factors. Results: A total of 114 events were observed. Mean LAS was 11.7 ± 2.5% and 10.0 ± 2.7% in participants without and with events, respectively (P < 0.001). Increased LAS reduced the hazard ratio to 0.75 for univariate, and 0.88 for multivariate assessments, respectively (both P < 0.001). Conclusion: Assessment of long axis LV deformation by LAS is feasible and reproducible. Moreover, LAS predicts hard cardiovascular events and congestive heart failure in a multi-ethnic population without overt cardiovascular disease at inclusion. J. Magn. Reson. Imaging 2016;44:178–185.
KW - long axis strain
KW - multi-ethnic study
KW - myocardial dysfunction
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U2 - 10.1002/jmri.25135
DO - 10.1002/jmri.25135
M3 - Article
C2 - 26731196
AN - SCOPUS:84977634537
SN - 1053-1807
VL - 44
SP - 178
EP - 185
JO - Journal of Magnetic Resonance Imaging
JF - Journal of Magnetic Resonance Imaging
IS - 1
ER -