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Patent Ductus Arteriosus
- C403, #109
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play
pause
Listen for 2-3 minutes
Supine
Diaphragm
Listening Tips
Systole:
Crescendo-decrescendo murmur, peaking late systole.
S2:
Obscured.
Diastole:
Crescendo-decrescendo murmur continuing from systole.
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Lesson Text
This is an example of patent ductus arteriosus heard at the pulmonic position.
Before birth, the two major arteries—the aorta and the pulmonary artery—are connected by a blood vessel called the ductus arteriosus.
Shortly after birth the patent ductus closes and turns into a ligament. However, in certain abnormal circumstances the patent ductus remains open allowing blood to flow from the aorta into the pulmonary artery causing a strain on the right ventricle.
The first heart sound is normal. The second heart sound is obscured by a continuous crescendo-decrescendo murmur which runs from the beginning of systole to the end of diastole peaking at the second heart sound.
In the anatomy tab you can see an enlarged left atrium and left ventricle and turbulent blood flow from the aorta to the pulmonary artery through the patent ductus.
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soundID
87
maneuver
Supine
Title
Patent Ductus Arteriosus
Position
Pulmonic
realSoundID
5021
caseID
109
S1
Systole
Crescendo-decrescendo murmur, peaking late systole
S2
Obscured
Diastole
Crescendo-decrescendo murmur continuing from systole
features
lung sounds
False
chestpiece
Diaphragm
c403
CaseID
109
CourseID
29
CourseCaseOrder
2
ID
99