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Chiari network: a case report.

Navindra Phuyal¹, Niraj Pandey², Ananda Kumar Mishra³

¹Department of Anatomy, Rapti Academy of Health Sciences, Ghorahi, Dang, Nepal. itsmenavindra@gmail.com.

BMC Cardiovascular Disorders

|July 27, 2025

Summary

This summary is machine-generated.

The Chiari network, a remnant of the sinus venosus, is found in about 2% of people. While often incidental, this cardiac anomaly can be linked to arrhythmias and interfere with medical procedures.

Keywords:

Cardiac catheterization Chiari network Eustachian valve Right atrium

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Area of Science:

Cardiovascular Anatomy
Embryological Remnants

Background:

The Chiari network is a reticulated structure arising from the inferior vena cava valve.
It occurs in approximately 2% of the general population.

Purpose of the Study:

To describe a case of Chiari network identified during routine dissection.
To review the clinical significance and diagnostic methods for the Chiari network.

Main Methods:

Routine anatomical dissection of a cardiac specimen.
Identification and description of the Chiari network's anatomical features.
Review of literature regarding clinical associations and diagnosis.

Main Results:

A fenestrated Chiari network was observed, attached to the inferior vena cava valve and crista terminalis.
The network is associated with potential cardiac events like arrhythmias and guide wire entrapment.
It may also prevent pulmonary embolism by entrapping thrombi.
Transesophageal echocardiography is the preferred diagnostic method.

Conclusions:

The Chiari network is an embryological remnant of the sinus venosus.
It is typically found incidentally during echocardiography, dissection, or autopsy.
This cardiac anomaly may be associated with various pathologies.