Everything ECG Flashcards
(41 cards)
Leads I, II, III are referred to as what?
Standard limb leads
which waves are the marker of myocardial infarction?
Q waves
is it more likely or less likely for someone to be having a MI if the initial deflection in the QRS complex is up?
less likely
Which leads are septal leads?
V1 and V2
Which leads are the anterior leads?
V2, V3, V4
which leads are the lateral precordial leads?
V4, V5, V6
Which leads are the inferior leads
II, III, AvF
A “J” point is a common feature of a normal variant in the hearts electrical system known as what?
Early repolarization
What do you compare the ST elevation level too?
The PR segment baseline
What 5 things should you examine each ECG for?
- Rate
- Rhythm
- Axis
- Hypertrophy
- Infarct
How many seconds in one small box?
0.04 seconds
How many seconds is one full box (5 small box’s)
.20 seconds
When trying to determine the rhythm what 4 questions should you ask yourself?
- Are there P waves
- is the QRS wide or narrow
- is it regular or irregular
- is the P wave related to the QRS
an upward P wave in lead II, regular rhythm and rate between 60-100 is considered what?
NSR
What interval does the AV node make the heart beat at?
40-60 bpm
What is the ventricular escape rate?
30-40 bpm
If an electrical impulse is being generated above the av node or from the av node will the QRS be wide or narrow?
QRS will be narrow as in supraventricular rhythms
In what condition would you see a wide QRS complex even though the impulse was generated from the SA node (supraventricular)
if there is a bundle branch block
If the electrical conduction is being started from the AV node would the P wave be positive or negative in lead II?
It would be negative because the electrical current is going up ward toward the SA node so away from the lead creating a negative deflection.
If the conduction from the AV node toward the atria is faster than the conduction to the ventricle will you see an inverted P wave before or after the QRS?
before
If the conduction from the AV node toward the atria is slower than the conduction to the ventricle will you see an inverted P wave before or after the QRS?
after
If the conduction from the AV node toward the atria is the same speed as the conduction to the ventricle will you see an inverted P wave before or after the QRS?
neither, it will be hidden in the QRS so no p wave will be seen
would you expect an indoventricular escape rhythm to have a wide or narrow QRS?
wide
What are some common causes of reentry tachy?
Myocardial ischemia, and presence of an accessory pathway
