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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 contraction |
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Answer» Correct Answer - A In ECG, P-R interval is the time from the beginning of the P wave to the beginning of the ORS complex. It corresponds to the time lag from the onset of atrial depolarisation to the onset of ventricular depolarisation. Most of the delay occurs in the AV node. |
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