Bajpayee, PallaviKanasker, NeeleshVatsalaswamy, P2025-05-092025-05-092024-03Bajpayee Pallavi, Kanasker Neelesh, Vatsalaswamy P . An Unusual Chiari Network: Potential Risk in Cardiac Interventional Procedures . International Journal of Anatomy and Research. 2024 Mar; 12(1): 8827-88292321-42872321-8967https://imsear.searo.who.int/handle/123456789/243200The Chiari network, seen in the right atrium, is a remnant of the right valve of the sinus venosus, resulting due to the incomplete regression of the valve during development. It is found in approximately in 1.5 to 3% individuals. During routine dissection for the first year M.B.B.S. students, we came across a cadaveric heart that exhibited an unusual Chiari network. The network observed was a combination of thread like strands and mesh with fenestrations. It was attached to the right margin of the opening of the coronary sinus. The shape of the coronary sinus opening was oval, with a transverse diameter of 15.2 mm and a maximum width of 6.5 mm. No other anomaly of the right atrium was found. The Chiari network is commonly related with patent foramen ovale and with thromboembolic phenomenon. Though found incidentally, its importance cannot be overlooked as the network is possibly associated with complications during certain intracardiac interventional procedures. The authors have presented this case with a view to add to both, the morphological and pictorial data of the said developmental variation.Chiari networkcoronary sinus openingfenestratedmeshJournal ArticleIndiaAssociate Professor, Department of Anatomy, Dr D. Y. Patil Medical College Hospital & Research Centre, Dr D. Y. Patil Vidyapeeth, Pimpri, Pune 411018Professor, Department of Anatomy, Dr D Y Patil Medical College Hospital & Research Centre, Dr D. Y. Patil Vidyapeeth Pimpri, Pune 411018Professor (Anatomy) & Director Academics, Dr D Y Patil Medical College Hospital & Research Centre, Dr D. Y. Patil Vidyapeeth, Pimpri, Pune 411018