Asked by: Lilli Cataluña
asked in category: General Last Updated: 14th March, 2020

Is a prolonged PR interval dangerous?

Although a prolonged PR interval can signify conduction problems related to serious conditions such as a heart attack, a prolonged PR interval is most commonly seen in generally healthy, middle-aged to older adults and has been thought to reflect normal age-related changes.

Click to see full answer.


Similarly, you may ask, what does a prolonged PR interval mean?

Duration. A long PR interval (of over 200 ms) indicates a slowing of conduction between the atria and ventricles, usually due to slow conduction through the atrioventricular node (AV node). This is known as first degree heart block.

Secondly, are short PR interval dangerous? When its length is lesser than 0.120 seconds, we speak as a short PR-interval. This event has a great capacity for severe cardiac arrhythmia production. Both entities can be very dangerous, separately. When they are together in the same individual, the consequences could be deadly.

Also question is, how long can a PR interval be?

The P-R Interval The first measurement is known as the "P-R interval" and is measured from the beginning of the upslope of the P wave to the beginning of the QRS wave. This measurement should be 0.12-0.20 seconds, or 3-5 small squares in duration.

Is 1st degree AV block dangerous?

In rare instances, a first-degree heart block may develop into a more serious type of heart block that results in slower heartbeats. This may cause symptoms.

39 Related Question Answers Found

What is happening during the PR interval?

What does the PR interval tell you?

What medications cause a prolonged PR interval?


Is a short PR interval anything to worry about?

Is a long PR interval anything to worry about?

Is a short PR interval normal?


What causes a 1st degree AV block?

Does PR interval change with exercise?

What can cause the PR interval to change?


What is a 1st degree AV block on ECG?

Is 1st degree AV block serious?

What is a normal RR interval?


What is a normal P wave?