Sinoatrial block: Difference between revisions

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(SA Block)
 
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= Sinoatrial Block (SA Block) =
= Sinoatrial Block (SA Block) =


{|
{| border="1"
|+ During the event
|-
|-
|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
|-
|PR interval || Normal (0.12 - 0.20 sec), except during the dropped beat
| P wave | Upright and uniform, except during the dropped beat
|QRS || Normal (0.06 - 0.10 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
|}
|}


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