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Questions and Answers
Which wave represents the depolarization of the atria?
Which wave represents the depolarization of the atria?
- T wave
- R wave
- P wave (correct)
- QRS complex
Which interval is measured from the start of the P wave to the start of the Q wave?
Which interval is measured from the start of the P wave to the start of the Q wave?
- P-R interval (correct)
- QRS interval
- S-T segment
- T interval
Which wave represents the repolarization of the ventricles?
Which wave represents the repolarization of the ventricles?
- R wave
- T wave (correct)
- P wave
- QRS complex
Which wave represents the depolarization of the ventricles?
Which wave represents the depolarization of the ventricles?
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Which interval is measured from the end of the S segment to the start of the T wave?
Which interval is measured from the end of the S segment to the start of the T wave?
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Which interval is measured from the start of the Q wave to the end of the S wave?
Which interval is measured from the start of the Q wave to the end of the S wave?
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Study Notes
Cardiac Electrical Activity
- P Wave: Represents the depolarization of the atria, initiating atrial contraction.
- PR Interval: Measured from the start of the P wave to the start of the Q wave, indicating the time taken for impulses to travel from the atria to the ventricles.
- T Wave: Represents the repolarization of the ventricles, allowing them to reset after contraction.
- QRS Complex: Represents the depolarization of the ventricles, leading to ventricular contraction.
- ST Segment: Measured from the end of the S wave to the start of the T wave, reflecting the period when the ventricles are depolarized.
- QT Interval: Measured from the start of the Q wave to the end of the S wave, indicating the total duration of ventricular depolarization and repolarization.
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