Sinoatrial block: Difference between revisions
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= Sinoatrial Block (SA Block) = | = Sinoatrial Block (SA Block) = | ||
{| | {| border="1" | ||
|- | |- | ||
|Rate | | Rate | Normal to slow, defined by duration of frequency of block | ||
|- | |- | ||
|Rhythm | | Rhythm | Irregular when a block occurs | ||
|P wave | |- | ||
|PR interval | | P wave | Upright and uniform, except during the dropped beat | ||
|QRS | |- | ||
| 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. | |||
* After dropped beat, cycles continue on time. | |||
Revision as of 06:28, 30 March 2011
Sinoatrial Block (SA Block)
| Normal to slow, defined by duration of frequency of block |
| Irregular when a block occurs |
| Upright and uniform, except during the dropped beat |
| Normal (0.12 - 0.20 sec), except during the dropped beat |
| 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.
- After dropped beat, cycles continue on time.