Cardiac Embryology Flashcards
All major organ systems, including the cardiovascular system is formed between the ____ and ____ week of development
3rd and 8th
When is the embryo most susceptible to interfere with development
between the 3rd and 8th week of development
The cephalic portion of the heart tube within the first stage of cardiac embryology develops which system
arterial system
The caudal portion of the heart tube within the first stage of cardiac embryology develops which system
systemic venous system
Day __ and __ is considered the first stage of cardiac embryology
day 21 and 22
after the single tubular structure forms, in stage II, the structure bends to the __ to form the ______________
right;
atrioventriculobulbar loop
The cephalic aspect of the cardiac loop in stage II is called _______
bulbus cordis
what forms the truncus arteriosus in stage II of embryology
the bulbus cordis
if the tubular structure in stage II of development bends to the left instead of the right, what is the result
congenitally corrected left transposition
In what stage do the four cardiac chambers form
STAGE III day 27-35
what is formed between the atria in Stage III
septum primum
septum secundum
what descends from the top of the atria and form first in STAGE III
septum primum
what develops to the right of the septum premium and grows from ventral to dorsal
septum secundum
the _______ septum forms from the septa in several regions in stage III
ventricular
what develops within the right atrium in stage III
AV node and SA node
when does placental circulation begin
stage III
during stage IV of embryology, how many pairs of arches are formed from the truncus arteriosus
6 pairs
which pairs of the aortic arch, disappear
1,2,5
which pair forms the aortic arch and the right subclavian artery
4th pair
what does the 6th pair of the aortic arch form
the left forms the left pulmonary artery and DA
the right forms the right pulmonary artery
In stage IV, what happens if the truncus arteriosus doesn’t separate after it is divided into the aorta and pulmonary artery
perisistent truncus arteriosus
In stage IV, what happens if the truncus arteriosus doesn’t spiral after it is divided into the aorta and pulmonary artery
transposition resulted
In stage IV, what happens if the pulmonary artery is smaller within
TOF
