9 Questions
What is the most common type of atrial septal defect (ASD)?
Ostium secundum defects
Which structure is responsible for closing the interventricular foramen at the superior part of the ventricular septum?
Inferior endocardial cushion tissue
What causes the physiological closure of the ductus arteriosus after birth?
Bradykinin release
What is the function of the atrial septum in foetal circulation?
To allow blood to bypass the foetal lungs
What is the shape of the septum primum during its development?
Sickle-shaped
What condition results from the failure of the septum primum to close properly?
Atrial septal defect
What happens to the lungs during the transition from pre-natal to post-natal circulation?
Lungs deflate
What is a common symptom of atrial septal defects in older children and adults?
Exercise intolerance
Which heart chamber has higher pressure in post-natal circulation?
Left atrium
Learn about atrial septal defects, including ostium secundum defects which are the most common type, occurring in the region of the fossa ovalis. Explore the causes of ASDs such as excessive resorption of septum primum and underdevelopment of septum secundum. Understand the process of closure of the ductus arteriosus, from pre-natal blood flow to the physiological and anatomical closure post-natally.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
