[Primitive cardiomyopathies: dynamic geometry of left ventricular contraction].

51 patients with primitive cardiomyopathy were studied and classified (5 groups) on the basis of hemodynamic parameters and the modalities of left ventricular contraction: the first group was made up of patients with 'frontal sector' hyperkinesia, normal ejection fraction and without any dynamic obstruction of the ventricular flow; the second, of patients with hyperkinesia 'frontal and rear sector', raised ejection fraction and with dynamic obstruction; the third group was composed of patients with 'frontal sector' hyperkinesia, reduced motility on the mitral valvular level with appearance of insufficiency (maintained in the subsequent groups) and depression of the ejection fraction; dynamic obstruction was present. Groups IV and V included patients with progressive extension of hypokinesia to all marginal regions, up to the contraction pattern characterized by 'serious and diffused hypokinesia'. To conclude, a correlation of the contraction patterns is made, characterizing the various groups with a pathophysiological interpretation.