ABSTRACT
<p><b>OBJECTIVE</b>To investigate the clinicopathologic manifestations of non-compaction of ventricular myocardium (NVM).</p><p><b>METHODS</b>Clinical data, electrocardiograms, echocardiography images and pathologic changes were studied in five cases of non-compaction of ventricular myocardium.</p><p><b>RESULTS</b>The patient's ages ranged from 29 to 57 years old, all were males. Abnormal electrocardiograms were obtained in all of the 5 cases. Among them, 3 were diagnosed using echocardiography. Histopathologic examination showed that there were abnormally coarse muscle trabeculation and deep recesses, interlacing in arrangement, over the inner wall of the heart chambers. The compacted myocardium became thinning down gradually from the base to the apex of the heart. The non-compacted myocardium bundles locating close to the endocardium were coarse and orderless in arrangement, nuclei were irregular and abnormal, nevertheless, the arrangement and appearance of the muscle bundles near by the pericardium part were essentially normal and the cell nuclei were evenly distributed.</p><p><b>CONCLUSION</b>There are no specific clinical manifestations obtained in patients with non-compaction of ventricular myocardium, however, the pathologic changes are characteristic and a clinical diagnosis can be made by using echocardiography.</p>