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Sinus rhythm - Wikipedia, the free encyclopedia
In medicine, sinus rhythm is the normal beating of the heart, as measured by an electrocardiogram (ECG). Normal sinus rhythm indicates that the sinoatrial node is ...

Here's a recent post on Short PR, seem not serious as I read the responses.

What does a PR Interval of 0 mean? - Heart Rhythm - MedHelp
The PR interval can only be measured in sinus rhythm. If you are in atrial fib, there is no way to measure it so the computer enters the number zero.

PR Interval - Life in the Fast Lane - LITFL
Sinus rhythm with marked 1st degree heart block (PR interval 340ms)

PR interval - Wikipedia, the free encyclopedia
In electrocardiography, the PR interval is the period, measured in milliseconds, that extends from the beginning of the P wave (the onset of atrial depolarization ...

Rhythm 2 Sinus Arrhythmia. Similar to normal sinus rhythm except that PP and RR intervals are irregular because the SA node discharges at a variable frequency.

PR interval - Family Practice Notebook
This page includes the following topics and synonyms: PR interval, Shortened PR Interval, Prolonged PR Interval, Short PR Interval, Long PR Interval.

ECG Lecture: Sinus arrest, sinoatrial exit block, AV block ...
Simple ECG lecture about sinus arrest, sinoatrial exit block, AV block and escape rhythms. Slideshow was made with an audience of medical professionals in ...

PR Interval on 12-lead ECG - tutorial and basics ...
The time from the beginning of the P wave (atrial depolarization) to the beginning of the QRS complex (ventricular depolarization) is the PR interval.

The whole ECG - a really basic ECG primer - Anaesthetist
ECG scribbles. The following is a basic primer in interpretation of the ECG (EKG). It is intended solely for teaching purposes, and should not be relied upon in ...

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