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In ECG, P-R interval corresponds to
- a)time delay in A-V node
- b)S-A nodal conduction time
- c)increased ventricular contraction
- d)time interval between onset of ventricular contraction
Correct answer is option 'A'. Can you explain this answer?
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Verified Answer
In ECG, P-R interval corresponds toa)time delay in A-V nodeb)S-A nodal...
- Each peak in the ECG is identified with a letter from P to T that corresponds to a specific electrical activity of the heart.
- The P- wave represents the electrical excitation or depolarization of the atria.
- The QRS complex represents the depolarization of the ventricles which initiates the ventricular contraction.
- The contraction starts shortly after Q and marks the beginning of the systole.
- The T- wave represents the return of the ventricles from excited to a normal state or repolarization.
- The end of the T-wave marks the end of systole.
So, the correct option is 'Time delay in A-V node'.
Most Upvoted Answer
In ECG, P-R interval corresponds toa)time delay in A-V nodeb)S-A nodal...
Explanation:
ECG or electrocardiogram is a diagnostic tool used to monitor the electrical activity of the heart. It records the electrical impulses generated by the heart and displays it on a graph.
The P-R interval is the time interval between the onset of the P wave and the onset of the QRS complex. It represents the time delay in the atrioventricular (AV) node, which is the electrical gateway between the atria and the ventricles.
The AV node is responsible for delaying the transmission of the electrical signal from the atria to the ventricles. This delay allows the atria to contract and fill the ventricles with blood before the ventricles contract. This ensures that the blood is pumped efficiently from the heart.
The P-R interval is measured in milliseconds (ms) and typically ranges from 120 to 200 ms in adults. A prolonged P-R interval can indicate an AV conduction delay, which can be caused by various conditions such as heart block, myocardial infarction, or medication side effects.
Therefore, the correct answer is option 'A' – time delay in the AV node.
ECG or electrocardiogram is a diagnostic tool used to monitor the electrical activity of the heart. It records the electrical impulses generated by the heart and displays it on a graph.
The P-R interval is the time interval between the onset of the P wave and the onset of the QRS complex. It represents the time delay in the atrioventricular (AV) node, which is the electrical gateway between the atria and the ventricles.
The AV node is responsible for delaying the transmission of the electrical signal from the atria to the ventricles. This delay allows the atria to contract and fill the ventricles with blood before the ventricles contract. This ensures that the blood is pumped efficiently from the heart.
The P-R interval is measured in milliseconds (ms) and typically ranges from 120 to 200 ms in adults. A prolonged P-R interval can indicate an AV conduction delay, which can be caused by various conditions such as heart block, myocardial infarction, or medication side effects.
Therefore, the correct answer is option 'A' – time delay in the AV node.
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In ECG, P-R interval corresponds toa)time delay in A-V nodeb)S-A nodal conduction timec)increased ventricular contractiond)time interval between onset of ventricular contractionCorrect answer is option 'A'. Can you explain this answer?
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