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Long axis strain by MRI and echocardiography in a postmyocardial infarct population
Author(s) -
Gjesdal Ola,
Almeida André L.C.,
Hopp Einar,
Beitnes Jan Otto,
Lunde Ketil,
Smith HansJørgen,
Lima Joáo A.C.,
Edvardsen Thor
Publication year - 2014
Publication title -
journal of magnetic resonance imaging
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.563
H-Index - 160
eISSN - 1522-2586
pISSN - 1053-1807
DOI - 10.1002/jmri.24485
Subject(s) - ventricle , medicine , magnetic resonance imaging , myocardial infarction , cardiology , population , cardiac magnetic resonance imaging , diastole , systole , speckle tracking echocardiography , infarction , nuclear medicine , radiology , heart failure , ejection fraction , blood pressure , environmental health
Purpose To compare long axis strain (LAS) by magnetic resonance imaging (MRI) and echocardiography in a postinfarct patient population. Long axis left ventricle (LV) function is a sensitive index of incipient heart failure by echocardiography, but is less well established in MRI. LAS is an index of global LV function, which is easily assessed in cine loops provided by most cardiac MRI protocols. Materials and Methods In all, 116 patients (57 ± 9 years) were studied the same day using echocardiography and MRI 7.4 ± 4.1 months after a first myocardial infarction. LV length was measured in end diastole and end systole in conventional cine images with a temporal resolution of 50 msec or less, and LAS (%) was calculated as the change in LV length, relative to end diastole. Infarct mass was assessed by contrast‐enhanced MRI. Results LAS was progressively reduced in patients with larger infarcts, and demonstrated good correlations with infarct mass ( r = 0.55, P < 0.01). There was a good agreement between LAS assessed by echocardiography and MRI ( r = 0.77, P < 0.01), and between LAS by MRI and speckle tracking strain by echocardiography ( r = 0.74, P < 0.01). Conclusion LAS is an index that allows measurement of LV long axis function by conventional cine MRI. J. Magn. Reson. Imaging 2014;40:1247–1251 . © 2013 Wiley Periodicals, Inc .