Final answer:
Pulmonary valve stenosis is characterized by a systolic ejection murmur and possible split second heart sound. The murmur is heard best over the left upper sternal border. severe stenosis, a delayed closure of the right ventricular outflow tract may be audible.
Step-by-step explanation:
Pulmonary valve stenosis refers to a narrowing of the pulmonary valve, which is the valve that controls blood flow from the heart to the lungs. When auscultating a patient with pulmonary valve stenosis, the clinician may hear a systolic ejection murmur. This murmur can be described as a harsh, crescendo-decrescendo sound that is heard best over the left upper sternal border. Additionally, if the stenosis is severe, the clinician may hear a split second heart sound. This occurs because the stenosed pulmonary valve takes longer to close, resulting in a delayed closure of the right ventricular outflow tract.