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What is the normal PR interval? If the PR interval is 0.25, where is the delay?

User Taunya
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Final answer:

The normal PR interval ranges from 0.12 to 0.20 seconds. A PR interval of 0.25 seconds indicates a delay, which could be due to an issue in the heart's conduction system.

Step-by-step explanation:

The PR interval is a part of an electrocardiogram (ECG) tracing that measures the time from the beginning of atrial depolarization (the P wave) to the initiation of ventricular depolarization (the QRS complex). A normal PR interval typically ranges from 0.12 to 0.20 seconds (120-200 milliseconds).

In the scenario where the PR interval is 0.25, there is a delay. The delay would be visible between the P wave and the QRS complex. This delay could indicate a problem with the conduction system of the heart, particularly between the SA node and the AV node.

User Theodosia
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