Background. In the last fifteen years on the European continent and also worldwide, the prevalence of cardiopulmonary metastrongyloidosis in dogs and cats has increased significantly, especially cases involving those parasites which are the most important for veterinary practice (Angiostrongylus vasorum, Aelurostrongylus abstrusus and Crenosoma vulpis).Scope and Approach. The aim of this study is to present a detailed clinical-parasitological approach to highlight the importance of these helminths, and to display the newest findings concerning the diagnostic possibilities in dogs and cats Key Findings and Conclusions. The effects of global warming, vector range shift, the frequent transportation and movement of animals to other epizootic areas, as well as the intensification of merchandise transportation and movement of people are just some of the potential factors which could impact the dynamics of incidence, upkeep and spread of cardiopulmonary nematodoses in carnivores. For the timely implementation of effective treatment of sick animals, it essential to accurately diagnose these parasitoses. Accurate, timely diagnosis can, in the end, significantly contribute to the prognostic course of disease in infected carnivores. Cardiopulmonary metastrongyloidoses in dogs and cats have great clinical-parasitological significance because of their high degree of pathogenicity, their spread outside endemic areas, the difficulties encountered in establishing their diagnosis, and the fact that they represent a potential danger to human health.MM participated in the design of the sudy, assisted in data collection, analysis and translation in English. IT has designed the paper, selected references for the presentation and wrote manuscript. SP; has made substantial contribution to the conception an design, acquisition and interpretation of data, drafted the manuscript and prepared final version for publication. OS participated in the design of the sudy, assisted in data collection and analysis. DS has made critical revise of the concept, has given substantial contribution to analysis and interpretation, and been involved in drafting the manuscript and revising critically. All authors read and approved the final manuscript, and agree to be accountable for all aspects of the work in ensuring that questions related to the accuracy and integrity of any part of the work are appropiately.