This is the pre peer-reviewed version of the following article, "Phase analysis detects heterogeneity of myocardial deformation on cine MRI", which in its final form has been published at Scand Cardiovasc J. This is the pre peer-reviewed version of the following article, "Phase analysis detects heterogeneity of myocardial deformation on cine MRI", which in its final form has been published at Scand Cardiovasc J. This is the pre peer-reviewed version of the following article, "Phase analysis detects heterogeneity of myocardial deformation on cine MRI", which in its final form has been published at Scand Cardiovasc J. 2015 Mar 10:1-24. [Epub ahead of print] PMID: 25752486.-3 - Abstract ObjectivesMyocardial scar will lead to heterogeneous left ventricular deformation. We hypothesized that a myocardial scar will display an elevated standard deviation of phase and that this effect could be compared with mechanical dispersion. DesignThirty patients (3 women and 27 men) were investigated 4-8 weeks after STelevation myocardial infarction treated with percutaneous coronary intervention.Seventeen had a scar area >75% in at least one antero-or inferoseptal segment (scar) and 13 had scar <1% (non-scar). The phase delays of velocity, displacement and strain were measured in the longitudinal direction, tangential to the endocardial outline, and in the radial direction, perpendicular to the tangent. ResultsThe standard deviation of phase in radial measurements differentiated scar patients from those without scar (p<0.01), while longitudinal measurements did so only for longitudinal strain. Likewise, the standard deviation for radial measurements of time to peak for segmental velocity, displacement and strain performed better than longitudinal measurements and equal to the results of phase. ConclusionPhase dispersion in deformation imaging may be used for detecting heterogeneous left ventricular contraction.This is the pre peer-reviewed version of the following article, "Phase analysis detects heterogeneity of myocardial deformation on cine MRI", which in its final form has been published at Scand Cardiovasc J.

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