APEX EKG Test / Comprehensive Study Guide – Expert
Strategies, Review of Key Quizzes, and Practice
Questions for Guaranteed Success / Newest
2025/2026.
EKG Grid - (answers)Each small square (the smaller lighter boxes within the big
bold boxes) represents 0.04 seconds
Each larger square (the boxes within the bold lines) represents 0.2 seconds.
Each large square has 5 small squares across SO 0.04 X 5 = 0.2 seconds
The 6 Second Strip Method - (answers)Least accurate, but quickest way to
estimate rate especially in irregular rhythms
EKG - (answers)
EKG intervals - (answers)
P Wave - (answers)Atrial depolarization
PR Interval - (answers)Normal is 0.12 to 0.20 seconds
Corresponds to the delay the AV node provides to allow for ventricular filling
QRS Complex - (answers)Normal is <0.12 seconds usually between 0.06 to 0.10
seconds
, Ventricular depolarization
QT Interval - (answers)Normal 0.36-0.46
6 Steps for Rhythm Interpretation - (answers)Determine Regularity
Calculate the Rate
Evaluate the P wave
Measure the PRI
Evaluate the QRS Width
Evaluate the T wave and Calculate the QTI
Normal Sinus Rhythm - (answers)Regularity: atrial and ventricular rate are regular
Rate: 60 to 100 beats per minute
P wave: upright, smooth, round and uniform shape, one for every QRS complex
PRI : 0.12 to 0.20 seconds
QRS: 0.06 to 0.10 seconds
QTI: 0.36 to 0.46 seconds
T wave: upright, smooth and round uniform shape
Sinus Bradycardia - (answers)Regularity: atrial and ventricular rate are regular
Rate: < 60 beats per minute
P wave: upright, smooth, round and uniform shape, one for every QRS complex
Strategies, Review of Key Quizzes, and Practice
Questions for Guaranteed Success / Newest
2025/2026.
EKG Grid - (answers)Each small square (the smaller lighter boxes within the big
bold boxes) represents 0.04 seconds
Each larger square (the boxes within the bold lines) represents 0.2 seconds.
Each large square has 5 small squares across SO 0.04 X 5 = 0.2 seconds
The 6 Second Strip Method - (answers)Least accurate, but quickest way to
estimate rate especially in irregular rhythms
EKG - (answers)
EKG intervals - (answers)
P Wave - (answers)Atrial depolarization
PR Interval - (answers)Normal is 0.12 to 0.20 seconds
Corresponds to the delay the AV node provides to allow for ventricular filling
QRS Complex - (answers)Normal is <0.12 seconds usually between 0.06 to 0.10
seconds
, Ventricular depolarization
QT Interval - (answers)Normal 0.36-0.46
6 Steps for Rhythm Interpretation - (answers)Determine Regularity
Calculate the Rate
Evaluate the P wave
Measure the PRI
Evaluate the QRS Width
Evaluate the T wave and Calculate the QTI
Normal Sinus Rhythm - (answers)Regularity: atrial and ventricular rate are regular
Rate: 60 to 100 beats per minute
P wave: upright, smooth, round and uniform shape, one for every QRS complex
PRI : 0.12 to 0.20 seconds
QRS: 0.06 to 0.10 seconds
QTI: 0.36 to 0.46 seconds
T wave: upright, smooth and round uniform shape
Sinus Bradycardia - (answers)Regularity: atrial and ventricular rate are regular
Rate: < 60 beats per minute
P wave: upright, smooth, round and uniform shape, one for every QRS complex
