EKG STRIPS EXAM WITH CORRECT
ANSWERS 2025
1. Atrial Flutter -has a "saw tooth or picket fence"
atrial pattern (no P waves, F-waves in stead
that may be in a ratio) between the QRS
complexes.
2. Atrial Fibrillation-Has "chaotic" atrial
electrical activity (no P waves, f-waves
instead) with irregular R-R inter- vals.
3. PJCs cause the rhythm to be irregular. The P
wave is inverted if it can be seen. It may
occur before, during or after the QRS. The P
wave will not be seen due to its low voltage.
4. Junctional Rhythm may have an inverted or
absent P wave. The P wave may occur
before, during or after the QRS complex.
The rate for this rhythm is 40-60 bpm.
5. Accelerated Junctional Rhythm may have an
inverted or absent P wave. The P wave may
occur before, during or after the QRS complex.
The rate for this rhythm is 60-100 bpm.
6. Junctional Tachycardia Rhythm may have an
inverted or absent P wave. The P wave may
occur before, during or after the QRS complex.
The rate for this rhythm is 100-180 bpm
7. Supraventricular Tachycardia presents with a
"nor- mal-narrow" appearing QRS complex
and a rate of greater than 150 bpm.
Remember for heart rates ap- proaching 150 or
higher, it will be very likely that the P wave will
be buried. Be prepared to increase1/
6
the paper
speed for this rhythm.
, EKG STRIPS EXAM WITH CORRECT
ANSWERS 2025
8. First Degree AV Block, the PR interval is
constant and measures greater than 0.20
second.
9. Second Degree AV Blocok Mobitz I
(Wenkebach) has a cyclical prolonging PR
interval until the QRS is dropped. Then the
cycle begins again. ***Remember the clue
"lengthen, lengthen drop Wenkebach.
10. Second Degree (AV) Block has a constant PR
interval with blocked QRS complexes
11. Second Degree (AV) Block has a
constant PR interval with blocked QRS
complex (2)
12. Third Degree (Complete) Heart Block, the P-P
and R- R intervals are regular (constant) but
firing at different rates.
13. T wave inversion, or negatively deflected T
wave in- dicates ischemia and is usually seen
with ST segment elevation.
14. T wave inversion with ST elevation on a 12-
lead ECG is considered myocardial injury,
acute injury pattern, or acute
15. Physiologic Q wave is normal and the width
measures less than 0.04 second and the depth
measures less than one-third of the height of
the R wave in that lead.
2/
6
16. Pathologic Q wave indicates tissue death
(infarction) and is defined as measuring
0.04 second and/or
ANSWERS 2025
1. Atrial Flutter -has a "saw tooth or picket fence"
atrial pattern (no P waves, F-waves in stead
that may be in a ratio) between the QRS
complexes.
2. Atrial Fibrillation-Has "chaotic" atrial
electrical activity (no P waves, f-waves
instead) with irregular R-R inter- vals.
3. PJCs cause the rhythm to be irregular. The P
wave is inverted if it can be seen. It may
occur before, during or after the QRS. The P
wave will not be seen due to its low voltage.
4. Junctional Rhythm may have an inverted or
absent P wave. The P wave may occur
before, during or after the QRS complex.
The rate for this rhythm is 40-60 bpm.
5. Accelerated Junctional Rhythm may have an
inverted or absent P wave. The P wave may
occur before, during or after the QRS complex.
The rate for this rhythm is 60-100 bpm.
6. Junctional Tachycardia Rhythm may have an
inverted or absent P wave. The P wave may
occur before, during or after the QRS complex.
The rate for this rhythm is 100-180 bpm
7. Supraventricular Tachycardia presents with a
"nor- mal-narrow" appearing QRS complex
and a rate of greater than 150 bpm.
Remember for heart rates ap- proaching 150 or
higher, it will be very likely that the P wave will
be buried. Be prepared to increase1/
6
the paper
speed for this rhythm.
, EKG STRIPS EXAM WITH CORRECT
ANSWERS 2025
8. First Degree AV Block, the PR interval is
constant and measures greater than 0.20
second.
9. Second Degree AV Blocok Mobitz I
(Wenkebach) has a cyclical prolonging PR
interval until the QRS is dropped. Then the
cycle begins again. ***Remember the clue
"lengthen, lengthen drop Wenkebach.
10. Second Degree (AV) Block has a constant PR
interval with blocked QRS complexes
11. Second Degree (AV) Block has a
constant PR interval with blocked QRS
complex (2)
12. Third Degree (Complete) Heart Block, the P-P
and R- R intervals are regular (constant) but
firing at different rates.
13. T wave inversion, or negatively deflected T
wave in- dicates ischemia and is usually seen
with ST segment elevation.
14. T wave inversion with ST elevation on a 12-
lead ECG is considered myocardial injury,
acute injury pattern, or acute
15. Physiologic Q wave is normal and the width
measures less than 0.04 second and the depth
measures less than one-third of the height of
the R wave in that lead.
2/
6
16. Pathologic Q wave indicates tissue death
(infarction) and is defined as measuring
0.04 second and/or
