Fetal Circulation
At the liver, blood is shunted through the ________ to the IVC.
What is the ductus venosus?
The heart is formed from a _____________.
What is primordial tubes?
By the third week of life, flow in the heart is ________
What is unidirectional?
Which ventricle is responsible for cardiac output to the body during fetal circulation?
What is the right ventricle?
Which ventricle is dominant in fetal circulation and supplies ___ % of the blood flow to the body?
What is the right ventricle and 65%?
Development of the heart begins in the __________
What is the mesoderm?
Blood from the DV has about ___ % oxygen saturation
What is 83%
What is the first stage of heart development in utero?
What is formation of the cardiac tube?
After birth, closure of the foramen ovale is due to a _________ atrial pressure that exceeds _______ atrial pressure
What is left and right?
Normal cardiac looping occurs to the________.
What is the right side?
Blood from the DV is about ___ % total thoracic IVC blood flow?
What is 35%
If this fetal structure fails to close, blood is shunted from the aorta to the pulmonary artery and is more common in females and pre-term infants.
What is patent ductus arteriosus (PDA)?
Functional closure of the ductus arteriosus occurs at ________.
What is a few hours after birth?
Complete functional closure of the DA usually within 1 hour after birth
Anatomic closure within 1-3 months
Cardiac chamber start to partition at _______ weeks.
What is 6 weeks?
What % of blood flow goes from the ductus venosus to the liver?
What is 50%?
What is the oxygen saturation in the umbilical vein?
What is 83%
Ventricular wall thickness of R and L ventricle are _____ at birth
What is equal?
Thickness of LV increased in relation to right by about 2 years of age
Truncus arteriosus is divided to form ______ and _____.
What is the aorta and pulmonary artery?
There is a 10 fold _____ in pulmonary vascular resistance (PVR) with the baby's first breath.
What is decrease?
As the atrioventricular valves form, each cusp forms its own attached ____________ and ____________.
What is papillary muscle and chordae tendinea?