Echo Normal Variants Quiz

Where is the eustachian valve located?

Along ridge of posterior wall of the right atrium and runs from right side of IVC to interatrial septum

Where is the Chiari network located and what is it characterized by?

Attached to the wall of the right atrium close to the opening of the IVC Whip like motion in right atrium

What is the moderator band?

Band like structure that transmits right bundle branch from the bundle of his to the right ventricle

What are some examples of normal variants?

Chiari network Eustachian valve Moderator band False tendons Sigmoid septum

In fetal circulation what did the eustachian valve do?

Direct oxygenated blood to foramen ovale and away from right atrium

What is the eustachian valve and what can it be mistaken for?

Embryologic remnant of the inferior vena cava valve in the right atrium Mass

What is the fossa ovalis?

Remanent of thin fibrous sheet that covered foramen ovale in fetal development

What is the Chiari network?

Remnant of the valves of the sinus venosus from fetus

Where is the moderator band located?

Right ventricle passing from IVS to the free wall of the right ventricle

What are false tendons and where are they located?

String like structures Left ventricle extending from IVS to the papillary muscles near the lateral wall of the left ventricle

What does the Chiari network look like?

Web like structures with variable number of thread like components

What is the sigmoid septum?

When the IVS and left ventricular outflow tract change with age Septum become S shaped and bulges into outflow tract