How does valvular aortic stenosis affect the $2 heart sound?
1. S2 is heard more crisply, as the A2 component is affected by degenerating sclerotic tissue.
2. S2 is heard less crisply, as the A2 component is affected by degenerating sclerotic tissue.
3. S2 is heard more crisply, as the P2 component is affected by degenerating sclerotic tissue.
4. S2 is heard less crisply, as the P2 component is affected by degenerating sclerotic tissue.
5. Aortic stenosis causes splitting of the $2 heart sound, which is heard more easily.