Sino-atrial exit block: Difference between revisions
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{{Chapter|Sinus node rhythms and arrhythmias}} | {{Chapter|Sinus node rhythms and arrhythmias}} | ||
[[Image:sa_exit_blok.jpg|thumb|Sino-atrial exit block]] | [[Image:sa_exit_blok.jpg|thumb|Sino-atrial exit block (more precisely: type II second degree SA exit block)]] | ||
During sino-atrial exit block, the depolarizations that occur in the sinus node cannot leave the node towards the atria. They are blocked. On the ECG this is expressed as a pause. SA exit block can be | [[Image:sa_exit_blok2.png|thumb|Sino-atrial exit block]] | ||
[[Image:sa_exit_blok3.jpg|thumb|Sino-atrial exit block]] | |||
During sino-atrial exit block, the depolarizations that occur in the sinus node cannot leave the node towards the atria. They are blocked. On the ECG this is expressed as a pause. SA exit block can be distinguished from [[sinusarrest]] because the pause in SA exit block is a multiple of the P-P interval that preceded the pause. | |||
Three subtypes can be destinguished:<cite>Braunwald</cite> | Three subtypes can be destinguished:<cite>Braunwald</cite> | ||
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==References== | ==References== | ||
<biblio> | <biblio> | ||
#Braunwald | #Braunwald isbn=0721605095 | ||
</biblio> | </biblio> | ||