When auscultating the anterior thorax of a pregnant woman,the nurse notes the presence of a murmur over the second,third,and fourth intercostal spaces.It is continuous but can be obliterated by pressure with the stethoscope or finger on the thorax just lateral to the murmur.The nurse knows that this is:

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Often blood flow through the blood vessels,specifically the internal mammary artery,can be heard over the second,third,and fourth intercostal spaces.This is called a mammary souffle,but it may be mistaken for a cardiac murmur.

When Auscultating the Anterior Thorax of a Pregnant Woman,the Nurse