This research reflects, from a theoretical perspective, how most of the international events that reach the rest of the media are disseminated through news agencies, causing the well-known «ventriloquist effect»: multiple media, a single voice; and explores how online platforms have fostered this phenomenon, causing a structural increase in misinformation. In this sense, the research aims to understand the development of the «ventriloquist effect» with the progress of «new media» and, as a consequence, the increase of disinformation. For this grounded theory documentary analysis, the methodological procedure was based on the bibliographic review of the literature in the international reference databases (WoS and Scopus), carrying out an analysis of primary studies to synthesize the information. The results indicate, among other issues, that social networks foster spaces of structural misinformation in the current ecosystem. In conclusion, the relationship between the "ventriloquist effect" and misinformation, which arises from reticularly and information-digital decentralization, is determined.