Atrial Septal Defect

Question 1

Examination Findings

Answer 1

Splitting of 2nd HS:

• due to too much blood being on the right side of the heart
• causing delayed shutting of the pulmonary valve (compared to aortic valve)

Ejection systolic murmur

Question 2

Complications

Answer 2

Paradoxical embolism: where VTE enters right atrium and cross across ASD into left atrium and could then go to e.g. brain

Question 3

Most common kind

Answer 3

Ostium Secondum

Question 4

ECG changes

Ostium secondum vs. primum

Answer 4

Ostium secondum = RBBB + right axis deviation

Ostium primum = RBBB + left axis deviation