Prunuske: EKG Flashcards
What is the common method for deducing rate on an EKG?
300 150 100 75 60 50
How do you check for sinus rhythm on an EKG?
P wave before every QRS and a QRS for every P
What do you check the PR interval for?
AV blocks
What do you check the QRS interval for?
Bundle blocks
What does prolonged QT interval look like on an EKG?
1/2 the R to R distance
What does a. flutter look like?
Saw tooth sequence of atrial complexes
Identical p waves
What does supraventricular tachycardia look like?
P and T waves merge (QRS narrow is a sign that it’s supraventricular)
What does a fib look like?
Polymorphic p waves d/t conduction starting in different places
What does ventricular tachycardia look like?
Wide QRS complex (>3 little boxes)
What does ventricular fibrillation look like?
> 300
NO R to R waves
Wide polymorphic QRS
What does a PVC look like on an EKG?
wide QRS complexes
Unifocal- all look the same
multifocal- variable origin
What does a PAC look like?
P waves are IN the PACs but they aren’t of sinus origin
What does a junctional rhythm look like?
In a junctional rhythm the impulse comes from the AV node. (SA node doesn’t control the heart rhythm d/t the block).
NO p waves
What would you see in a junctional block?
No QRS after each p
What is an AV block?
Block that delyas/prevents atrial impulses from reaching the ventricles
What does a first degree block look like on an EKG?
Prolonged PR interval > 1 square
What does a second degree type I block look like on an EKG?
There’s a P before every QRS, but NOT a QRS after every P. PR increases until it DROPS a QRS.
What does a 2nd degree type II block look like?
Doesn’t have a progressive pattern and there are ps without QRSs.
What does a 3rd degree block look like?
P waves are regular but they don’t line up with the QRS b/c the ventricle is beating on it’s own.
What is Torsades de pointes?
Prolonged QT precedes rhythm that leads to ventricular tachycardia
What is a normal axis?
0-90 degrees
Lead I: pos
aVF: pos
What else is a normal axis?
-30 to 0 degrees
I: pos
aVF: neg
II: pos
What is a left axis deviation?
-30 to 90
I: pos
aVF: neg
(also requires a negative II lead)
What is right axis deviation?
+90 to +180
I: neg
aVF: pos
