The paper presents the review of the literature data and the results of the authors' own experience in the aspects of the origin and clinical interpretation of "innocent" cardiac murmurs (ICM). It was suggested that ICM were a regular phenomenon in the majority of the young people. Contradictions in current views on the problem of ICM appearance were discussed from the point of view of the leading importance of disproportion in the development of the major vessels and cardiac cavities, systolic regurgitation at atrioventricular valvular dysfunction, hyperkinetic cardiac effects. The paper presents the data which permit one to consider morphofunctional features of intracardiac structures violating the uniformity and equality in the cardiac release tracts as leading causes of ICM appearance. Pathogenetic unity of ICM and organic murmurs was distinguished as the manifestation of murmuring turbulent flows. Principle difference between the leading mechanisms of these murmurs occurrence was discussed as well.