Normal Fetal Heart Anatomy

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What is a normal heart rate in a fetus?

120-160

When does the heart tube begin to develop and when is it fully formed?

Begins to develop at the 5th week and is fully formed by the 10th week.

Under 100 bpm sustained in 2nd and 3rd trimester is considered to be what?

Bradycardia

Which is the most posterior chamber of the heart?

Left atrium

What can be used to prove which chamber is the right ventricle in abnormal hearts?

Moderator band

What is the foramen ovale?

Opening between the atria (blood flows from the right atrium to the left atrium)

Which is the most anterior chamber of the heart?

Right ventricle

What does the ductus arteriosis do?

Shunts blood from the pulmonary artery to the aortic arch to bypass the lungs during fetal life

Over 200 bpm sustained in 2nd and 3rd trimester is considered to be what?

Tachycardia


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