Chiari Network on POCUS Echocardiogram - A4C Chiari network - fenestrated, net-like embryonic remnants of valves of sinus venosus, lying in close relation to the IVC and coronary sinus. Usually an incidental finding. May be associated with infective endocarditis, arrhythmias, thrombosis. Dr. Abhilash Koratala - NephroPOCUS @NephroP #Chiari #Network #POCUS #Echocardiogram #clinical #a4c