CARDIOVASCULAR- Embryology Flashcards
What does Truncus arteriosus gives rise to?
Ascending aorta and pulmonary trunk
In heart embriology what gives place to Smooth parts (outflow tract) of left and right ventricles?
Bulbus cordis
What does primitive atria gives rise to?
Trabeculated part of left and right atria
Trabeculated part of left and right ventricles come from
Primitive ventricle
What does Primitive pulmonary vein gives rise to?
Smooth part of left atrium
From where does Coronary sinus comes from?
Left horn of sinus venosus (SV)
Right horn of Sinus venosus gives rise to…
Smooth part of right atrium
Superior Vena Cava comes from…
Right common cardinal vein and right anterior cardinal vein
Which is the first functional organ in vertebrate embryos?
Heart
When does the heart starts to beat?
Beats spontaneously by week 4 of development
When does the primary heart tube loops to establish left-rigth polarity?
Begins in week 4 of gestation
What does defect in left-rigth dynenin can lead?
Dextrocardia
Which syndrome presents dextrocardia? what else does it presents?
Kartagener syndrome (primary ciliary dyskinesia)
Septum primum grows toward endocardial cushions, narrowing foramen primium
First Step of septation of Atria
What happens in Second step of septation of Atria?
Foramen secundum forms in septum primum (foramen primum disappears)
Septum secundum develops as formaen secundum maintains rigth to left shunt
Third Step of septation of Atria
Septum secundum expands and covers most of the formaen secundum. The residual formanen is the foramen ovale
Forth Step of septation of Atria
Which is the fifth Step of septation of Atria?
Remaining portion of septum primum forms valve of foramen ovale
Septum secundum and septum primum fuse to form the atrial septum
Sixth Step of septation of Atria
Which is the final step of Step of septation of Atria?
Foramen ovale closes soon after birth because of ↑ LA pressure
Which is the reason of Patent foramen ovale?
Caused by failure of septum primum and septum secundum to fuse after birth; most are left untreated
Which could be the complications of Patent foramen ovale?
Can lead to paradoxical emboli (venous thromboemboli that enter systemic arterial circulation) similar to those resulting from ASD
Muscular ventricular septum forms. Opening is called interventricular foramen
First step of Septation of Ventricles
Which is the second step of septation of ventricles?
Aorticopulmonary septum rotates and fuses with muscular ventricular septum to form membranous interventricular septum, closing interventricular foramen