Basic ECG Interpretation Conduction System, Waveforms, and Lead Analysis
Basic ECG Interpretation: Conduction System, Waveforms, and Lead Analy
sis
Study online at https://quizlet.com/_jru95h
1. What initiates the normal cardiac beat? The SA node
2. How does the wave of depolarization spread through It spreads rapidly through
the atria? the right atrium (RA) and
left atrium (LA) via gap
junctions.
3. What structure does the depolarization wave pass The bundle of Bachmann
through to reach the left atrium?
4. What happens at the AV node during depolarization? There is a delay to al-
low the atria to completely
empty.
5. What does the QRS complex represent on an ECG? Ventricular depolarization
6. What does the T wave represent on an ECG? Ventricular repolarization
7. What is the PR segment on an ECG? It represents conduction
into the ventricles and is
flat due to the AV node de-
lay.
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, Basic ECG Interpretation Conduction System, Waveforms, and Lead Analysis
Basic ECG Interpretation: Conduction System, Waveforms, and Lead Analy
sis
Study online at https://quizlet.com/_jru95h
8. What does the U wave represent? The last phase of ventricu-
lar repolarization.
9. What does the QT interval represent? The total ventricular activity
from depolarization to re-
polarization.
10. What indicates a positive deflection on an ECG lead? It means the depolariza-
tion wave is traveling to-
wards that lead.
11. What occurs during repolarization? The net charge goes from
positive on the outside to
negative on the outside.
12. Why is atrial repolarization not visible on an ECG? It is hidden in the QRS
complex.
13. How do ventricles repolarize compared to depolariza- Ventricles repolarize in the
tion? opposite direction from
depolarization.
14. What is R wave progression? The height of the R wave
increases as it gets closer
to lead V6.
2/8
Basic ECG Interpretation: Conduction System, Waveforms, and Lead Analy
sis
Study online at https://quizlet.com/_jru95h
1. What initiates the normal cardiac beat? The SA node
2. How does the wave of depolarization spread through It spreads rapidly through
the atria? the right atrium (RA) and
left atrium (LA) via gap
junctions.
3. What structure does the depolarization wave pass The bundle of Bachmann
through to reach the left atrium?
4. What happens at the AV node during depolarization? There is a delay to al-
low the atria to completely
empty.
5. What does the QRS complex represent on an ECG? Ventricular depolarization
6. What does the T wave represent on an ECG? Ventricular repolarization
7. What is the PR segment on an ECG? It represents conduction
into the ventricles and is
flat due to the AV node de-
lay.
1/8
, Basic ECG Interpretation Conduction System, Waveforms, and Lead Analysis
Basic ECG Interpretation: Conduction System, Waveforms, and Lead Analy
sis
Study online at https://quizlet.com/_jru95h
8. What does the U wave represent? The last phase of ventricu-
lar repolarization.
9. What does the QT interval represent? The total ventricular activity
from depolarization to re-
polarization.
10. What indicates a positive deflection on an ECG lead? It means the depolariza-
tion wave is traveling to-
wards that lead.
11. What occurs during repolarization? The net charge goes from
positive on the outside to
negative on the outside.
12. Why is atrial repolarization not visible on an ECG? It is hidden in the QRS
complex.
13. How do ventricles repolarize compared to depolariza- Ventricles repolarize in the
tion? opposite direction from
depolarization.
14. What is R wave progression? The height of the R wave
increases as it gets closer
to lead V6.
2/8
