00:00
Hi! Welcome to our video serie.
00:03
In this one we're going to look
at acute coronary syndrome.
00:06
What happens from
ischemia to infarct.
00:09
So for those of you that
are interested in ER
you're going to love this topic.
00:14
Let's talk about what
everyone needs to know about
what causes cardiac chest pain.
00:19
The cause is inadequate
oxygen to the heart muscle.
00:22
It's kind of heart muscles
way of communicating to you.
00:25
Hello.
00:26
I'm not getting what I need.
00:28
So I'm going to make
sure you're aware of it
by causing chest pain.
00:32
Now Ischemia,
the whole goal of ischemia
is to try to prevent it from
becoming myocardial infarction.
00:39
So we define ischemia as
chest pain or discomfort
that's caused by
the cardiac muscle
not getting enough oxygen.
00:46
Now that can be caused by
a vasospasm by a thrombus,
that's a clot that would
break off and travel
where it blocked
off the blood supply
or coronary atherosclerosis.
00:57
Now, it's an early sign
the point of recognizing
ischemia is ischemia
is to prevent it from
becoming infarction.
01:05
So the tissue still viable
if we can get
perfusion restored,
then we can still
rescue that tissue.
01:12
And I want to go back
and explain a little bit
about chest pain
and what's really going
on in a cellular level
because less oxygen,
Now I know you already
know that's a problem,
but I want to break it
down a little bit for you
because less oxygen and glucose
for the anaerobic metabolism
and the body switches over
to anaerobic metabolism.
01:33
So if you cut off that
oxygen supply to the heart,
which is what's going on
got less oxygen and
glucose available
you go from aerobic
metabolism, oxygen-based
to anaerobic metabolism.
01:46
Now, you've got metabolic
and lactic acidosis
at all accumulates that's
what we've got going on.
01:52
So not enough oxygen,
you know, I've not have
oxygen and not enough glucose
because you don't
have blood supply
you end up switching
from a Aerobic metabolism
to anaerobic metabolism
and you're building
up this lactic acid.
02:06
That's what accumulates and
that's why you feel that pain
because that myocardial
fibers they get all irritated.
02:13
And that's where
the pain comes from.
02:15
So back it up a little bit
and walk through that with me.
02:18
Why do you have pain?
Because those myocardial
fibers are irritated.
02:23
Why are they irritated?
Because you have a
buildup of lactic acid.
02:28
Why do we have the lactic acid?
Because without oxygen
and glucose to the cells
because the blood
supply has been cut off
you switch from aerobic
metabolism to anaerobic.
02:41
There you go.
02:42
Now, you've got it down
on a cellular level why it
hurts to not have enough oxygen
or good blood supply
to the muscle.
02:48
I know ischemia is
warning sign for us.
02:51
That's a call to action we need
to do something to resolve that.
02:55
So our goal is to stop ischemia
from becoming infarcted tissue
because infarcted
tissue is dead tissue
dead tissue, stiff tissue,
that means the heart
is not going to be
as efficient as it was before
the myocardial infarction.
03:11
So that's our goal educate our
patients educate ourselves.
03:15
So we recognize ischemia
when it happens and
we know what to do.
03:20
Now myocardial infarction
is because that
oxygenated blood supply
that was inadequate
it's been cut off long enough
that the tissue is
dead from less oxygen.
03:31
All right, you've got it.
03:32
So if we ask you to
pause for a minute,
can you answer the question?
What's the difference
between ischemia
and myocardial infarction?