PROPHECY EKG EVALUATION EXAMS 2025/2026 ANSWERS
AND QUESTIONS GRADED A+
✔✔3rd Degree AV Block - ✔✔Atrials and ventricles don't communicate
Rate: regular atrial
P wave: Present, upright
No relationship between P waves and QRS
PR Interval: VARIABLE
QRS: variable
P-P ad R-R consistent but NO correlation
Husband and wife live separate lives and don't communicate
✔✔SA Node - ✔✔1st
60-100
✔✔AV Node - ✔✔2nd
40-60
✔✔Bundle of His - ✔✔3rd
40-45
✔✔Right and Left Bundle Branches - ✔✔4th
40-45
✔✔Purkinje Fibers - ✔✔5th
20-50
✔✔1 Small Box - ✔✔0.04 sec
✔✔1 Big Box - ✔✔0.20 sec
✔✔Junctional Rhythms - ✔✔SA Node DID NOT FIRE
AV Node fired
NO P WAVE bc SA node didn't fire
Narrow QRS
✔✔P Wave - ✔✔Amplitude 0.5-2.5 mm
Will be shorter than T wave
Shows firing of SA node
✔✔QRS - ✔✔0.06-0.10 sec SHOULD BE <0.12 sec
, Wide QRS: delay in ventricular contraction, delay of conduction through bundle
branches or purkinje fibers
BUNDLE BRANCH BLOCK or BLOCK IN PURKINJE FIBERS (idioventricular)
✔✔Calculate Regular Rate - ✔✔1500/ # boxes R-R
✔✔Calculate Irregular Rate - ✔✔# of Rs in 6 sec strip X 10
✔✔Unifocal PVCs - ✔✔Only 1 shape PVC
✔✔Bigeminy - ✔✔PVC occurs every OTHER beat
✔✔Trigeminy - ✔✔PVC occurs every THIRD beat
✔✔Couplet - ✔✔2 PVCs together
✔✔Triplet - ✔✔3 PVCs together
✔✔Multifocal - ✔✔Multiple shapes
✔✔Monomorphic V Tach - ✔✔Same Shapes V Tach
✔✔Polymorphic V Tach - ✔✔Different Shapes V tach
✔✔Coarse V Fib - ✔✔Chopy but not as high as polymorphic V tach
✔✔Fine V Fib - ✔✔Fine and fibrillatory
✔✔Idioventricular Rhythms - ✔✔Only purkinje fibers firing
WIDE QRS always
✔✔Atrially Paced - ✔✔Spike comes before P
✔✔Ventricularly Paced - ✔✔Spike comes before QRS and QRS will be wide
✔✔AV Paced - ✔✔Spike before P and before QR
✔✔Failure to Capture - ✔✔Spikes with no QRS
✔✔Failure to Sense - ✔✔Spikes happen regardless of QRS on their own
✔✔How to determine the rhythm - ✔✔Regular or irregular?
Rate?
AND QUESTIONS GRADED A+
✔✔3rd Degree AV Block - ✔✔Atrials and ventricles don't communicate
Rate: regular atrial
P wave: Present, upright
No relationship between P waves and QRS
PR Interval: VARIABLE
QRS: variable
P-P ad R-R consistent but NO correlation
Husband and wife live separate lives and don't communicate
✔✔SA Node - ✔✔1st
60-100
✔✔AV Node - ✔✔2nd
40-60
✔✔Bundle of His - ✔✔3rd
40-45
✔✔Right and Left Bundle Branches - ✔✔4th
40-45
✔✔Purkinje Fibers - ✔✔5th
20-50
✔✔1 Small Box - ✔✔0.04 sec
✔✔1 Big Box - ✔✔0.20 sec
✔✔Junctional Rhythms - ✔✔SA Node DID NOT FIRE
AV Node fired
NO P WAVE bc SA node didn't fire
Narrow QRS
✔✔P Wave - ✔✔Amplitude 0.5-2.5 mm
Will be shorter than T wave
Shows firing of SA node
✔✔QRS - ✔✔0.06-0.10 sec SHOULD BE <0.12 sec
, Wide QRS: delay in ventricular contraction, delay of conduction through bundle
branches or purkinje fibers
BUNDLE BRANCH BLOCK or BLOCK IN PURKINJE FIBERS (idioventricular)
✔✔Calculate Regular Rate - ✔✔1500/ # boxes R-R
✔✔Calculate Irregular Rate - ✔✔# of Rs in 6 sec strip X 10
✔✔Unifocal PVCs - ✔✔Only 1 shape PVC
✔✔Bigeminy - ✔✔PVC occurs every OTHER beat
✔✔Trigeminy - ✔✔PVC occurs every THIRD beat
✔✔Couplet - ✔✔2 PVCs together
✔✔Triplet - ✔✔3 PVCs together
✔✔Multifocal - ✔✔Multiple shapes
✔✔Monomorphic V Tach - ✔✔Same Shapes V Tach
✔✔Polymorphic V Tach - ✔✔Different Shapes V tach
✔✔Coarse V Fib - ✔✔Chopy but not as high as polymorphic V tach
✔✔Fine V Fib - ✔✔Fine and fibrillatory
✔✔Idioventricular Rhythms - ✔✔Only purkinje fibers firing
WIDE QRS always
✔✔Atrially Paced - ✔✔Spike comes before P
✔✔Ventricularly Paced - ✔✔Spike comes before QRS and QRS will be wide
✔✔AV Paced - ✔✔Spike before P and before QR
✔✔Failure to Capture - ✔✔Spikes with no QRS
✔✔Failure to Sense - ✔✔Spikes happen regardless of QRS on their own
✔✔How to determine the rhythm - ✔✔Regular or irregular?
Rate?
