What is the normal PRI interval range?

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Study for the Cardiac HealthStream Telemetry Exam. Dive into detailed flashcards and multiple choice questions, each with helpful hints and explanations. Prepare thoroughly for your exam!

Multiple Choice

What is the normal PRI interval range?

Explanation:
The PR interval measures the time from the start of the P wave to the start of the QRS complex, reflecting conduction from the atria through the AV node to the ventricles. In a healthy adult, this interval is normally 0.12 to 0.20 seconds (120–200 ms). That’s why this option is the best choice. Values shorter than 0.12 seconds suggest faster conduction (which can occur with accessory pathways), while values longer than 0.20 seconds indicate some degree of AV block. The range 0.12–0.20 seconds fits the normal conduction timing.

The PR interval measures the time from the start of the P wave to the start of the QRS complex, reflecting conduction from the atria through the AV node to the ventricles. In a healthy adult, this interval is normally 0.12 to 0.20 seconds (120–200 ms). That’s why this option is the best choice. Values shorter than 0.12 seconds suggest faster conduction (which can occur with accessory pathways), while values longer than 0.20 seconds indicate some degree of AV block. The range 0.12–0.20 seconds fits the normal conduction timing.

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