Sino-atrial exit block: Difference between revisions

m
no edit summary
mNo edit summary
mNo edit summary
Line 1: Line 1:
{{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 destinguished from [[sinusarrest]] because the pause in SA exit block is a multiple of the P-P interval that preceded the pause.
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 destinguished from [[sinusarrest]] because the pause in SA exit block is a multiple of the P-P interval that preceded the pause.