Welcome to our cardiovascular heart sounds.
Here is a lot to talk about, so let us get started.
To begin with, what is the heart sound? Rememeber, heart
sounds are only created by closure or opening?
Closure, all of the time. Anytime that you
have these valves are open, they don't ever
create a heart sound. Is that clear? It must
be understood for us to then continue. What
then happens to a valve when it becomes narrowed?
We will take a look at what may then happen
if the valve becomes narrowed versus what
happens when it becomes expanded. And each
one is then going to give us different types
of heart sounds and then eventually we are
going to get into the different locations
anatomically around our chest in which it's
going to then give us clues as to diagnosis
of our patient. And that will be fun, you will
see. If the valve is expanded, the root of
the valve, for example, we talk about congestive
heart failure and tell me about their heart. When you're
looking at this heart on x-ray, I want you to close your
eyes and think about as such. There you have
it. There's a chest x-ray and now you find the apex,
which is laterally displaced and normally
should be at the fifth intercostal space,
midclavicular. But with congestive heart
failure, you might find apex, which is now
laterally displaced and maybe midaxillary.
Not sign of good, that is a bad sign. With
that expansion of that heart is it possible
that the valves and the root then become expanded?
Of course. And would it make any sense for
it become smaller? And so, therefore, when you
do have such expansion of the root, then you
would have what kind of flow? You would have
a flow that perhaps would be regurgitative,
so, therefore, flowing backward.