Sinus Node Rhythms and Arrhythmias: Difference between revisions

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;Criteria for normal sinus rhythm (see also [[Basics]]):
;Criteria for normal sinus rhythm (see also [[Basics]]):
*A P-wave (atrial contraction) precedes the QRS complex
*A P wave (atrial contraction) precedes the QRS complex
*Every P is followed by a QRS complex
*Every P is followed by a QRS complex
*The rhythm is regular, but varies slightly while breathing
*The rhythm is regular, but varies slightly while breathing
*The frequency ranges between 60 and 100 beats per minute
*The frequency ranges between 60 and 100 beats per minute
*The P-waves maximum height is 2.5 mm in II and/or III
*The P waves maximum height is 2.5 mm in II and/or III
*The P-wave is positive in I and II, and biphasic in V1
*The P wave is positive in I and II, and biphasic in V1


These last two definitions will be discussed in the topic [[P wave morphology]].
These last two definitions will be discussed in the topic [[P wave morphology]].

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