The authors deal with the relation of echocardiography and diseases of the cardiac muscle, draftly classified as cardiopathies. The author's starting point is issued from the presumption that heart diseases which lack the characteristic diagnostic signs in echocardiographic picture affect the heart's systolic and diastolic functions. Echocardiography enables to quantify the extent of affliction of both functions. On the basis of analysis of a set of 22 prospectively examined patients the authors judge as to wether the results of individual volume measurements by means of echocardiographic imaging (one dimensional, two dimensional, Doppler) are correct. In the frame of systolic and diastolic functions examination they highlight the Doppler evaluation due to its technical simplicity and good correlations with literal documents dealing with invasive examinations.