Sinoatrial block: Difference between revisions

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{| border="1"
{| border="1"
|-
|-
| Rate | Normal to slow, defined by duration of frequency of block
| '''Rate'''
| Normal to slow, defined by duration of frequency of block
|-
|-
| Rhythm | Irregular when a block occurs
| '''Rhythm'''
| Irregular when a block occurs
|-
|-
| P wave | Upright and uniform, except during the dropped beat
| '''P wave'''
| Upright and uniform, except during the dropped beat
|-
|-
| PR interval | Normal (0.12 - 0.20 sec), except during the dropped beat
| '''PR interval'''
| Normal (0.12 - 0.20 sec), except during the dropped beat
|-
|-
| QRS |Normal (0.06 - 0.10 sec), except during the dropped beat
| '''QRS'''
| Normal (0.06 - 0.10 sec), except during the dropped beat
|}
|}


* Cardiac output will decrease, possibly causing syncope or dizziness.
* Cardiac output will decrease, possibly causing syncope or dizziness.
* Occurs in some multiple of the PP interval.
* Occurs in some multiple of the PP interval.
* After dropped beat, cycles continue on time.
* After dropped beat, cycles continue on time.
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