Q. A condition characterised by a prolonged PR interval more than 0.2 secs in ECG is called
Solution:
The term block is somewhat misleading in the case of first-degree AV block because there is no actual block, but merely an abnormal delay of the impulse conduction from the atria to the ventricles. This manifests as a prolonged PR interval on the ECG. The PR interval is =0.22 s in first-degree AV-block.
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