Comparison of echocardiographic features of noncompaction of the left ventricle in adults versus idiopathic dilated cardiomyopathy in adults

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Abstract

Noncompaction of left ventricular myocardium (NCLV), or “spongy myocardium,” in adults represents an arrest in endomyocardial morphogenesis and occurs as an isolated cardiomyopathy. Because NCLV can be readily mistaken for idiopathic dilated cardiomyopathy, echocardiographic features other than the structural features of the myocardial wall need to be carefully defined for distinguishing the 2 conditions. This study was therefore designed to characterize the echocardiographic features that could be useful for differentiating NCLV from idiopathic dilated cardiomyopathy.

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    In this study, cardiac MRI was applied in a group of adult patients with IVNC to analyze the relationship of the extent and severity of myocardial non-compaction with LV systolic function. In previous reports, non-compacted segments have been almost invariably described as dysfunctional [7,22,23]. The findings obtained in the present study documented that, at a regional level, LV systolic function deteriorates with increasing severity of myocardial non-compaction as expressed by the NC/C ratio.

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