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Questions and Answers
What is the normal duration range of the QRS wave in an ECG?
What is the normal duration range of the QRS wave in an ECG?
- 0.04 - 0.1 second (correct)
- 0.047 second
- 0.12 seconds
- Not elevated more than 1mm
What does the P wave represent in an electrocardiogram (ECG)?
What does the P wave represent in an electrocardiogram (ECG)?
- Contraction of the ventricles
- Contraction of the atrium (correct)
- Relaxation of the ventricles
- Elevation of the ST segment
What does the T wave represent in an electrocardiogram (ECG)?
What does the T wave represent in an electrocardiogram (ECG)?
- Contraction of the atrium
- Elevation of the ST segment
- Contraction of the ventricles
- Relaxation of the ventricles (correct)
Study Notes
ECG Waves
- The normal duration range of the QRS wave in an ECG is 0.08-0.12 seconds.
- The P wave represents the atrial depolarization, which is the electrical activity that occurs when the atria (upper chambers) of the heart contract.
- The T wave represents the ventricular repolarization, which is the period when the ventricles (lower chambers) of the heart recover and prepare for the next heartbeat.
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Description
Test your knowledge of the cardiac conduction system with this quiz covering P wave, QRS wave, T wave, PR interval, and ST segment. See how well you understand the timings and functions of each wave and interval in the heart's electrical activity.
