Sinus Node Rhythms and Arrhythmias: Difference between revisions
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Sinus Node Rhythms and Arrhythmias (view source)
Revision as of 22:48, 7 February 2009
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==Normal heart rhythm: sinus rhythm== | ==Normal heart rhythm: sinus rhythm== | ||
<flashow>http://nl.ecgpedia.org/images/0/09/Normal_SR.swf|align=right|height=300px|width=300px</flashow> | <flashow>http://nl.ecgpedia.org/images/0/09/Normal_SR.swf|align=right|height=300px|width=300px</flashow> | ||
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With this knowledge it is quite simple to recognise normal sinus rhythm on the ECG. | With this knowledge it is quite simple to recognise normal sinus rhythm on the ECG. | ||
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!Criteria for normal sinus rhythm (see also [[Basics]]): | |||
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*A [[P wave morphology]] P wave (atrial contraction) precedes every QRS complex | *A [[P wave morphology]] P wave (atrial contraction) precedes every QRS complex | ||
*The rhythm is regular, but varies slightly while breathing | *The rhythm is regular, but varies slightly while breathing | ||
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*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 | ||
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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]]. | ||