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Sinoatrial block: Difference between revisions
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→Sinoatrial Block (SA Block)
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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. | ||