Auscultation Training by Repetition

Atrial Septal Defect - C402, #110

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Listen for 2-3 minutes

Supine

Diaphragm

Listening Tips

Systole: Diamond shaped, brief, early murmur.
S2: Fixed splitting.
Diastole: Diamond shaped, brief, early murmur.

Repetition Training - Intermediate Heart Sounds

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Lesson Text

This is an auscultation example of an atrial septal defect as heard at the pulmonic position. Atrial Septal Defect is a congenital condition associated with abnormal blood flow between the left atrium and the right atrium. Before birth there is a large connection between right and left atria. During development of the fetus the connection gradually disappears. However, in some cases the opening persists and is known as an atrial septal defect. Both the first and second heart sounds are split. The second heart sound splitting is fixed at 80 milliseconds. There is a brief diamond shaped murmur in early systole and another brief diamond shaped murmur in early diastole In the anatomy tab you see an enlarged right atrium and right ventricle. You see turbulent blood flow across the tricuspid valve between the right atrium and the right ventricle (the diastolic murmur). This is caused by blood flow from the left atrium into the right atrium through the atrial septal defect. There is further turbulent flow into the pulmonary artery causing the systolic murmur.

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soundID	88
maneuver	Supine
Title	Atrial Septal Defect
Position	Pulmonic
realSoundID	5106
caseID	110
S1	Split
Systole	Diamond shaped, brief, early murmur
S2	Fixed splitting
Diastole	Diamond shaped, brief, early murmur
features
lung sounds	False
chestpiece	Diaphragm

c402

CaseID	110
CourseID	29
CourseCaseOrder	3
ID	100