Hi, my name is Tom and in this episode we're going to be going to be going through

Eisenmenga Syndrome. And you can find notes at 0.0.5.com and in the 0 to Finals Pediatrics book.

And you can find questions and flashcards to train your knowledge at members.0 tofinals.com.

So let's get straight into it.

Eisenmengar syndrome occurs when blood flows from the right side of the heart to the left side of the heart

across a structural heart lesion bypassing the lungs.

There are three types of underlying lesion that can cause Eisenmenga syndrome.

An atrial septal defect, which is a hole between the two atria atria at the top of the heart.

Ventricular septal defect, which is a hole between the two ventricles in the lower

part of the heart, or a patent ductus arteriosis, which is where the ductus arteriosis, which

connects the pulmonary to the aorta, stays open after birth.

Eisenmengar syndrome can develop within a few years with a large lesion or later in adulthood

with small lesions. It can develop more rapidly during pregnancy. Let's go through the

pathophysiology.

The systemic pressure on the left side of the heart is greater than the pulmonary pressure

on the right side of the heart.

It's harder to pump blood through the entire body than it is to pump blood through the lungs.

This means that blood will flow from the left side of the heart where there's a higher pressure

to the right side of the heart where there's a lower pressure across a defect,

and this is described as a left to right shunt.

Blood still travels to the lungs and gets oxygenated,

so the patient does not become cyanotic. Over time, the extra blood flowing into the right

...