Upon auscultation of the patient's chest, the nurse hears a whooshing sound at the fifth intercostal space. What does this finding indicate to the nurse?
a. The beginning of the systolic phase
b. Regurgitation of the mitral valve
c. The opening of the aortic valve
d. Presence of orthopnea
ANS: B
When regurgitation occurs, there is a backflow of blood into an adjacent chamber. For example, in mitral regurgitation the mitral leaflets do not close completely. When the ventricles contract, blood escapes back into the atria, causing a murmur, or "whooshing" sound. The systolic phase begins with ventricular filling and closing of the aortic valve, which is heard as the first heart sound, S1. Orthopnea is an abnormal condition in which a patient uses multiple pillows when reclining to breathe easier or sits leaning forward with arms elevated.
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