Final answer:
Heart sounds associated with significant valvular aortic stenosis include S4, which results from the contraction of the atria pushing blood into a stiff or hypertrophic ventricle, indicating failure of the left ventricle.
Step-by-step explanation:
Heart sounds associated with significant valvular aortic stenosis include: S4. The fourth heart sound, S4, results from the contraction of the atria pushing blood into a stiff or hypertrophic ventricle, indicating failure of the left ventricle. It occurs prior to the first heart sound, S1. Valvular aortic stenosis can cause the heart to work harder to propel blood through the narrowed valve, leading to the development of S4.