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Which of the following represents the repolarisation of atrial muscles and depolarisation of ventricular muscles in an electrocardiograph?
- a)P-wave
- b)PQ interval
- c)QT interval
- d)QRS complex
Correct answer is option 'D'. Can you explain this answer?
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Which of the following represents the repolarisation of atrial muscles...
It begins with a small negative deflection and represents the repolarisation of atrial muscles and depolarisation of ventricular muscles in an electrocardiograph.
Most Upvoted Answer
Which of the following represents the repolarisation of atrial muscles...
Understanding the Electrocardiogram (ECG)
The electrocardiogram (ECG) is a crucial tool in cardiology that records the electrical activity of the heart. Each component of the ECG waveform corresponds to specific electrical events in the heart.
QRS Complex: The Key Indicator
The QRS complex is the segment in the ECG that represents the following:
Why Other Options Are Incorrect
- P-wave: Represents atrial depolarization, not ventricular activity.
- PQ Interval: Reflects the time taken for electrical impulses to travel from the atria to the ventricles but does not represent muscle depolarization or repolarization directly.
- QT Interval: Measures the time from the start of ventricular depolarization to the end of ventricular repolarization, which involves both depolarization and repolarization phases, but does not specifically represent atrial repolarization.
Conclusion
In summary, the QRS complex is the correct answer as it effectively represents the depolarization of the ventricles while simultaneously indicating the repolarization of the atrial muscles in the heart's electrical cycle. Understanding these correlations is essential for interpreting ECGs accurately, especially in a clinical context such as NEET examinations.
The electrocardiogram (ECG) is a crucial tool in cardiology that records the electrical activity of the heart. Each component of the ECG waveform corresponds to specific electrical events in the heart.
QRS Complex: The Key Indicator
The QRS complex is the segment in the ECG that represents the following:
- Depolarization of Ventricular Muscles: This is the primary electrical activity captured in the QRS complex. It indicates that the ventricles are preparing to contract and pump blood out of the heart.
- Repolarization of Atrial Muscles: While the ventricles depolarize, the atria are simultaneously repolarizing, which is not visually distinct but occurs during this phase.
Why Other Options Are Incorrect
- P-wave: Represents atrial depolarization, not ventricular activity.
- PQ Interval: Reflects the time taken for electrical impulses to travel from the atria to the ventricles but does not represent muscle depolarization or repolarization directly.
- QT Interval: Measures the time from the start of ventricular depolarization to the end of ventricular repolarization, which involves both depolarization and repolarization phases, but does not specifically represent atrial repolarization.
Conclusion
In summary, the QRS complex is the correct answer as it effectively represents the depolarization of the ventricles while simultaneously indicating the repolarization of the atrial muscles in the heart's electrical cycle. Understanding these correlations is essential for interpreting ECGs accurately, especially in a clinical context such as NEET examinations.
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Which of the following represents the repolarisation of atrial muscles and depolarisation of ventricular muscles in an electrocardiograph?a)P-waveb)PQ intervalc)QT intervald)QRS complexCorrect answer is option 'D'. Can you explain this answer?
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