منابع مشابه
Post-systolic shortening: a functional window into ischemic memory?
Myocardial post-systolic shortening is characterized by a large variability in both duration and magnitude. Although typically occurring in a setting of ischemic heart disease, this regionally asynchronous myocardial contraction is considered a normal finding in approximately one-third of myocardial segments in healthy subjects, as long as the magnitude is low and the systolic strain is preserv...
متن کاملdoes the post-systolic shortening of the left ventricle by tissue doppler imaging predict coronary artery disease?
background abnormalities in the velocity and pattern of myocardial shortening on tissue doppler imaging (tdi) have been proposed to aid in the noninvasive diagnosis of coronary artery disease (cad). objectives we investigated the diagnostic value of post-systolic shortening (pss), a delayed ejection velocity of the myocardium after the closure of the aortic valve, on tdi in the diagnosis of cad...
متن کاملMagnetic resonance imaging of post-systolic shortening in a closed-chest rat model of coronary occlusion using myocardial tagging
The aim of the study was to evaluate the reliability and sensitivity of tagged cardiac magnetic resonance imaging (cMRI) in assessment of regional cardiac dysfunction induced by short ischemia. For clinical low dose dobutamine tests, quantitative strain analyses derived from tagged cMRI have been shown to be able to detect viable myocardium. However these preliminary data were obtained in patie...
متن کاملIs post-systolic shortening a reliable indicator of myocardial viability? An MR tagging and late-enhancement study.
PURPOSE In ischemic myocardium systolic strain is reduced and followed by a deformation after systole, the so-called post-systolic shortening. The presence of post systolic shortening is therefore considered a marker of viability even though its mechanism remains unclear. The hypothesis was tested whether post-systolic shortening might be a passive recoil phenomenon and therefore not uniquely a...
متن کاملPost-buckling response of thin composite plates under end-shortening strain using Chebyshev techniques
In this paper, a method based on Chebyshev polynomials is developed for examination of geometrically nonlinear behaviour of thin rectangular composite laminated plates under end-shortening strain. Different boundary conditions and lay-up configurations are investigated and classical laminated plate theory is used for developing the equilibrium equations. The equilibrium equations are solved dir...
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ژورنال
عنوان ژورنال: JACC: Cardiovascular Imaging
سال: 2012
ISSN: 1936-878X
DOI: 10.1016/j.jcmg.2011.09.014