Chiari Network: What You Need to Know

A Unique Echo Finding

Background

The Chiari network was first described in 1897 by Hans Chiari and is essentially a leftover part of the embryo that may be visualized in the right atrium with echocardiography. During fetal development, the right valve of the sinus venosus is supposed to regress to form the crista terminalis, eustachian, and thebesian valves. If this regressio…