What type of murmur is typically associated with aortic stenosis?

• A. Holosystolic murmur
• B. Crescendo-decrescendo systolic murmur
• C. Diastolic murmur
• D. Continuous murmur

Answer: (B)

Aortic stenosis is characterized by a characteristic heart murmur known as a crescendo-decrescendo systolic murmur. This type of murmur is produced by the turbulent flow of blood through the narrowed aortic valve during systole. As the left ventricle ejects blood into the aorta, the sound initially increases in intensity (crescendo) as the flow accelerates, reaches its peak, and then decreases in intensity (decrescendo) as the blood flow rate slows down in the later stages of ejection. This creates a distinct pattern that is easily identifiable when listening to the heart with a stethoscope.

The classic location for auscultation of this murmur is at the right second intercostal space, which is the typical area where the aortic valve can be best heard. The timing and quality of the murmur, along with associated signs such as a weak or delayed carotid pulse, help to clarify aortic stenosis when diagnosed clinically. This cascade of sound dynamics is crucial in differentiating between various types of heart murmurs. Understanding these attributes of the aortic stenosis murmur can greatly aid in diagnosing this condition in a clinical setting.