Acute Coronary Syndrome Flashcards
For 12 Lead EKG, just note that how many leads are actually being placed ?
6
what is at the fifth intercostal space at the midclavicular line ?
apical pulse
what is the function of an EKG?
electrical activity/conduction that is going through the heart at the moment
what is the most useful EKG?
having a baseline EKG, usually starting at 50 years old because if you have chest pain coming in at an older age, then compare the baseline and today of having chest pain
does a normal EKG means that your heart is perfect?
yes or no and why ?
no
it just shows that a the very moment, a normal electrical conduction is being sent through your heart
how long is the EKG strip?seconds wise?
6 second
having a 6 second EKG strip, if the heart is normal, what can you estimate?
a pulse
multiple this by 10
what does the P wave mean?
atrial depolarization
what does the QRS complex mean?
ventricular depolarization
what does T wave mean?
ventricular repolarization
can we tell where in the heart a heart attack is happening through an EKG?
yes or no and why ?
yes
we can see through an EKG that if the person if having a heart attack, the respected lead will show abnormality in that certain section of the heart
what is ischemia ?
when there is not enough oxygen getting into your heart ; doesn’t mean you have tissue death currently unless
we dont fix it, there will be tissue death
what conditions have ischemia issues ? (3)
acute coronary syndrome
heart attack
unstable angina
what are we doing to see in ischemia on an EKG?
ST-segment depression & T wave inversion
ST-segment depression is significant if it is at least 1mm ( one small box ) below the isoelectric line
does ST-segment depression and T wave inversion for ischemia ever go back to normal and if it can, how can it?
it can change back to normal when we fix the adequate blood flow and oxygen back to the myocardium
( heart )
If there is an injury( usually necrosis is going on) to the heart, what can we see in an EKG?
ST-segment elevation occurs
- significant if >1mm above the isoelectric line
ST-segment elevation happens when there is damage/injury to the heart, what do most people call it when looking at the EKG?
tombstones
if we treat the injury of the heart causing ST-segment elevation promptly and effectively, what are we avoiding?
infarction
if the injury of the heart causing ST-segment elevation has absence of _____markers confirms that ____didnt happen
serum cardiac markers
no infarction didn’t happen
Sometimes with ST-segment elevation we can have pathologic Q wave, what does it mean ?
there is probably ischemia to the cardiac muscle
How do we know when an infarction is happening or has happened in the EKG?
Physiologic Q wave is the first negative deflection following the P wave
What is acute coronary syndrome ?
Prolonged Ischemia to the heart muscle, that may or not been reversible ;
not reversible immediately
Acute coronary syndrome is a underbelly term that covers what two subjects?
Unstable & stable angina
myocardial infarction
what are some characteristic of stable angina ?
narrowing but not completely blocked of the blood flow