NURS 401 Exam 3 Questions With Complete
Solutions
Why is the left bundle branch larger? Because the left side of the heart is larger and
requires more force/strength for contraction.
The P wave represents what on an ECG? Atrial depolarization (contraction)
The QRS complex represents what on ...
Where is the ST segment measured? What does it represent? Measured from the end of
the QRS complex to the beginning of the T wave (should a flat/isometric line).
Represents early ventricular repolarization. (if the segment is not flat, this indicates the issue is
likely caused by something wrong with the ventricles)
Where is the QT interval measured? What does it represent? Measured from the
beginning of the QRS complex to the end of the T wave.
Represents the time it takes for the ventricles to fully contract and fully relax.
What is the normal time for a P wave? QRS complex? P wave should be no more than 5
small blocks (0.12-0.2 seconds)
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