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Sinus Node Rhythms and Arrhythmias: Difference between revisions
Sinus Node Rhythms and Arrhythmias (view source)
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The sinus node (SA) is located in the roof of the right atrium. It is the fastest physiological pacemaker. When the sinus node generates an electrical impulse, the surrounding cells of the right atrium depolarize. Then the cells of the left atrium, the AV (atrioventricular)node, follow, and at last the ventricles are stimulated via the His bundle. | The sinus node (SA) is located in the roof of the right atrium. It is the fastest physiological pacemaker. When the sinus node generates an electrical impulse, the surrounding cells of the right atrium depolarize. Then the cells of the left atrium, the AV (atrioventricular)node, follow, and at last the ventricles are stimulated via the His bundle. | ||
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With this knowledge it is quite simple to recognize normal sinus rhythm on the ECG. | With this knowledge it is quite simple to recognize normal sinus rhythm on the ECG. | ||
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==Sinus arrhythmias== | ==Sinus arrhythmias== | ||
Some variants of sinus rhythm exist: | Some variants of sinus rhythm exist: | ||
*[[Asystole]] | *[[Asystole]] | ||
*[[Sinustachycardia|Sinustachycardia (>100 beats per minute)]] | *[[Sinustachycardia|Sinustachycardia (>100 beats per minute)]] | ||
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*[[Sinusarrest|Sinus arrest or pause]] | *[[Sinusarrest|Sinus arrest or pause]] | ||
*[[Sino-atrial_exit_block|Sino-atrial exit block]] | *[[Sino-atrial_exit_block|Sino-atrial exit block]] | ||
*[[Sick Sinus Syndrome]] | |||
*[[Sinus Arrhythmia]] | |||
Arrhythmias are discussed in the [[Arrhythmias]] chapter. | Arrhythmias are discussed in the [[Arrhythmias]] chapter. | ||