4,200
edits
Sino-atrial exit block: Difference between revisions
Jump to navigation
Jump to search
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 (more precisely: type II second degree SA exit block)]] | [[Image:sa_exit_blok.jpg|thumb|Sino-atrial exit block (more precisely: type II second degree SA exit block)]] | ||
[[Image:sa_exit_blok2.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 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. | ||