2025 ECG Interpretation Competency Test Guide –
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Represents total ventricular activity - depolarization and repolarization
normal QT = less than ½ the preceding R-R.
Choose an answer
1 PR Interval 2 Premature Junctional Contractions (PJCs)
3 Long PR 4 QT Interval
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Terms in this set (56)
PR Interval Beginning of P wave to beginning of Q wave
represents atrial activity and AV conduction time
normal PR = 0.12-0.20 sec.
QRS Complex Beginning of Q wave to end of S wave
represents ventricular depolarization
normal = < 0.12 sec.
Long QRS ≥ 0.12 sec; indicates bundle branch block.
Short PR < 0.12 sec; consider junctional rhythm.
Long PR > 0.20 sec; indicates 1st degree heart block.
T Wave Represents ventricular repolarization
normal = upright, rounded.
, P Wave Represents atrial depolarization
normal = upright, rounded.
ST Segment Represents early ventricular repolarization
should be flat line at/around baseline.
QT Interval Represents total ventricular activity - depolarization and
repolarization
normal QT = less than ½ the preceding R-R.
QTc Corrected QT; a standardized number that accounts for
variability based on heart rate;
normal QTc = 0.35-0.44 sec (male); 0.35-0.46 sec (female).
Long QT At risk for R on T phenomenon/lethal arrhythmias.
ECG Graph Paper Small box = 0.04 sec
Big box = 0.20 sec
1 big box = 5 small boxes
1 second = 5 big boxes
6 seconds = 30 big boxes.
Premature Atrial Contractions (PACs) Has a P wave that may vary slightly from underlying rhythm;
normal QRS complex.
Premature Junctional Contractions (PJCs) P wave follows junctional rules: absent, inverted, or short PR;
normal QRS complex.
Premature Ventricular Contractions (PVCs) Wide/bizarre complex, no P wave; can be unifocal or
multifocal; must name underlying rhythm.
Couplet 2 PVCs.
Questions With Definite Solutions
Save
Students also studied
Chapter 29- Chest and Abdominal Tr... Chapter 21 Test Ch. 22 Study Guide
348 terms 24 terms 32 terms
anaphylacticshock Preview kenanderson2017 Preview Kendall_Dinning
Practice questions for this set
Learn 1 /7 Study using Learn
Represents total ventricular activity - depolarization and repolarization
normal QT = less than ½ the preceding R-R.
Choose an answer
1 PR Interval 2 Premature Junctional Contractions (PJCs)
3 Long PR 4 QT Interval
Don't know?
Terms in this set (56)
PR Interval Beginning of P wave to beginning of Q wave
represents atrial activity and AV conduction time
normal PR = 0.12-0.20 sec.
QRS Complex Beginning of Q wave to end of S wave
represents ventricular depolarization
normal = < 0.12 sec.
Long QRS ≥ 0.12 sec; indicates bundle branch block.
Short PR < 0.12 sec; consider junctional rhythm.
Long PR > 0.20 sec; indicates 1st degree heart block.
T Wave Represents ventricular repolarization
normal = upright, rounded.
, P Wave Represents atrial depolarization
normal = upright, rounded.
ST Segment Represents early ventricular repolarization
should be flat line at/around baseline.
QT Interval Represents total ventricular activity - depolarization and
repolarization
normal QT = less than ½ the preceding R-R.
QTc Corrected QT; a standardized number that accounts for
variability based on heart rate;
normal QTc = 0.35-0.44 sec (male); 0.35-0.46 sec (female).
Long QT At risk for R on T phenomenon/lethal arrhythmias.
ECG Graph Paper Small box = 0.04 sec
Big box = 0.20 sec
1 big box = 5 small boxes
1 second = 5 big boxes
6 seconds = 30 big boxes.
Premature Atrial Contractions (PACs) Has a P wave that may vary slightly from underlying rhythm;
normal QRS complex.
Premature Junctional Contractions (PJCs) P wave follows junctional rules: absent, inverted, or short PR;
normal QRS complex.
Premature Ventricular Contractions (PVCs) Wide/bizarre complex, no P wave; can be unifocal or
multifocal; must name underlying rhythm.
Couplet 2 PVCs.
