When assessing a baby for a murmur caused by an atrial septal defect, where should the nurse place the stethoscope?
A) Upper left sternal border
B) Upper right sternal border
C) Lower left sternal border
D) Apex
A) Upper left sternal border
Explanation: A) An atrial septal defect is a hole in the wall (septum) between the atria that allows oxygenated blood from the left atrium to flow (shunt) to the right atrium, whereupon it moves through the tricuspid valve to the right ventricle and on to the pulmonary system, producing a murmur heard best in the upper left sternal border.
B) An atrial septal defect is a hole in the wall (septum) between the atria that allows oxygenated blood from the left atrium to flow (shunt) to the right atrium, whereupon it moves through the tricuspid valve to the right ventricle and on to the pulmonary system, producing a murmur heard best in the upper left sternal border.
C) An atrial septal defect is a hole in the wall (septum) between the atria that allows oxygenated blood from the left atrium to flow (shunt) to the right atrium, whereupon it moves through the tricuspid valve to the right ventricle and on to the pulmonary system, producing a murmur heard best in the upper left sternal border.
D) An atrial septal defect is a hole in the wall (septum) between the atria that allows oxygenated blood from the left atrium to flow (shunt) to the right atrium, whereupon it moves through the tricuspid valve to the right ventricle and on to the pulmonary system, producing a murmur heard best in the upper left sternal border.
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