Long axis strain by MRI and echocardiography in a postmyocardial infarct population. Issue 5 (8th November 2013)

• Record Type: Journal Article
• Authors: Gjesdal, Ola; Almeida, André L.C.; Hopp, Einar; Beitnes, Jan Otto; Lunde, Ketil; Smith, Hans‐Jørgen; Lima, Joáo A.C.; Edvardsen, Thor
• Is Part Of: Journal of magnetic resonance imaging. Volume 40:Issue 5(2014)
• Page Start: 1247
• Page End: 1251
• Publication Date: 2013-11-08
• Subjects: Magnetic resonance imaging -- Periodicals; 616
• DOI: 10.1002/jmri.24485
• Languages: English
• ISSNs: 1053-1807

Abstract

<abstract abstract-type="main"> <title> <x xml:space="preserve">Abstract</x> </title> <sec id="jmri24485-sec-0001" sec-type="section"> <title>Purpose</title> <p>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.</p> </sec> <sec id="jmri24485-sec-0002" sec-type="section"> <title>Materials and Methods</title> <p>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.</p> </sec> <sec id="jmri24485-sec-0003" sec-type="section"> <title>Results</title> <p>LAS was progressively reduced in patients with larger infarcts, and demonstrated good correlations with infarct mass (<italic>r</italic> = 0.55, <italic>P</italic> < 0.01). There was a good agreement between LAS assessed by echocardiography and MRI (<italic>r</italic> = 0.77, <italic>P</italic> < 0.01), and between LAS by MRI and speckle tracking strain by echocardiography (<italic>r</italic> = 0.74, <italic>P</italic> < 0.01).</p> </sec> <sec id="jmri24485-sec-0004" sec-type="section"> <title>Conclusion</title> <p>LAS is an index that allows measurement of LV long axis function by conventional cine MRI.<bold>J. Magn. Reson. Imaging 2014;40:1247–1251</bold>. © <bold>2013 Wiley Periodicals, Inc</bold>.</p> </sec> </abstract>