ECG Abnormalities Flashcards
What is this?
1st Degree AV Block
A P wave is present and with normal configuration before every QRS complex.
The P-R interval is prolonged (greater than 0.20 second).
The QRS has a normal configuration.
The QRS duration is between 0.06 and 0.10 second.
The R-R intervals are regular.
The heart rate is usually within normal limits (60 to 100 beats per minute) but may be lower than 60 beats per minute.
“If R is far from P, then you have first degree”
What is this?
Mobitz 1/Wenckeback Second Degree AV Block
- Initially a P wave precedes each QRS complex, but eventually a P wave may stand alone (conduction is blocked).
- Progressive lengthening of the P-R interval occurs in progressive order
- As the P-R interval increases, a QRS complex will eventually be dropped i.e. P wave not associated with a QRS complex
- This progressive lengthening of the P-R interval followed by a dropped QRS complex occurs in a repetitive cycle.
- The QRS configuration is normal, and the duration is between 0.06 and 0.10 second
“Longer, longer, drop, then you have Wenckeback
What is this?
Mobitz 2 (Second Degree AV Block)
- Intermittent non-conducted p waves without progressive prolongation of PR interval.
- P waves “march through” at a constant rate.
- RR interval surrounding the dropped beats is an exact multiple of preceding RR interval
•“If some p’s don’t get through, then you have Mobitz II”
What is this?
3rd degree AV Block
- No impulses that are initiated above the ventricles are conducted to the ventricle
- Atria fire at their own inherent rate
- Ventricles fire at their own inherent rate
•“If Ps and Qs don’t agree, then you have 3rd degree”
What is this?
atrial arrhythmia
What is this?
A fib
What is this?
PVC
What is this?
V tach
What is this?
V fib
What is this?
ST Segment Elevation
What is this?
Ischemia
