Prunuske: EKG Flashcards
(42 cards)
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
