Knowledge Check: Clinical Presentation of Congenital Heart Disease in the First Week of Life – Murmurs
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Question 1 of 5
1. Question
Heart murmurs occur as result of ___________?
Hint
Murmurs are sounds that we hear from turbulent flow of blood in the heart. Turbulence is caused by a sudden drop in pressure.
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Question 2 of 5
2. Question
Which of the following is TRUE about the murmur of peripheral pulmonary stenosis?
Hint
After birth, there is a relative narrowing of the pulmonary arteries as blood flow increases through them. This leads to turbulent blood flow at branch points of the arteries.
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Question 3 of 5
3. Question
Which of the following is TRUE about the murmur associated with patent ductus arteriosus in the perinatal period?
Hint
The patent ductus arteriosus is a connection between the aorta and the pulmonary arteries. As it starts to close naturally in the first few days of life, blood flow becomes turbulent through this connection as it flows from the higher pressure aorta into the lower pressure pulmonary arteries. This type of murmur is most commonly benign and self-limited.
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Question 4 of 5
4. Question
You hear a murmur in a newborn baby. Which of the diagnostic tests has the highest sensitivity to rule out congenital heart disease in this baby?
Hint
Echocardiograms are excellent at determining cardiac anatomy, but may not be readily available in all settings.
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Question 5 of 5
5. Question
Which of the following lesions is dependent on a patent ductus arteriosus for systemic blood flow?
Hint
All of the above are duct dependent lesions. Tricuspid atresia, pulmonary atresia and tetralogy of Fallot are dependent on a patent ductus arteriosus for pulmonary blood flow.
