Difference between revisions of "Supraventricular Rhythms"
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*[[AVRT|Atrio-ventricular Reentry Tachycardia AVRT]] | *[[AVRT|Atrio-ventricular Reentry Tachycardia AVRT]] | ||
*[[AVJT|AV junctional tachycardia]] | *[[AVJT|AV junctional tachycardia]] | ||
| + | |||
| + | {| class="wikitable" font-size="90%" | ||
| + | |- style="text-align:center;background-color:#6EB4EB;" | ||
| + | |+'''An overview of tachycardias''' | ||
| + | |- | ||
| + | ! | ||
| + | !regularity | ||
| + | !atrial frequency | ||
| + | !ventricular frequency | ||
| + | !origin (SVT/VT) | ||
| + | !p-wave | ||
| + | !effect of adenosine | ||
| + | |- | ||
| + | | colspan="8" style="text-align:left;background-color:#cfefcf;" | '''Narrow complex (QRS<0.12)''' | ||
| + | |- | ||
| + | ! [[#sinustachycardia|sinustachycardia]] | ||
| + | | regular | ||
| + | | 100-180 bpm | ||
| + | | 100-180 bpm | ||
| + | | sinusnode (SVT) | ||
| + | | precedes every QRS complex | ||
| + | | gradual slowing | ||
| + | |- | ||
| + | ! [[#atrial fibrillation|atrial fibrillation]] | ||
| + | | grossly irregular | ||
| + | | 400-600 bpm | ||
| + | | 75-175 bpm | ||
| + | | atria (SVT) | ||
| + | | absent | ||
| + | | slows down rate; irregularity remains | ||
| + | |- | ||
| + | ! [[#atrial flutter|atrial flutter]] | ||
| + | | regular (sometimes alternating block) | ||
| + | | 250-350 bpm | ||
| + | | 75-150 bpm (3:1 or 2:1 block is most common) | ||
| + | | atria (SVT) | ||
| + | | negative sawtooth in lead II | ||
| + | | temporary reduced conduction (e.g. 4:1) | ||
| + | |- | ||
| + | ! [[#AVNRT|AVNRT]] | ||
| + | | regular | ||
| + | | 180-250 bpm | ||
| + | | 180-250 bpm | ||
| + | | AV-node (SVT) | ||
| + | | in QRS complex (R') | ||
| + | | stops | ||
| + | |- | ||
| + | ! [[#Atrial Tachycardia|Atrial tachycardia]] | ||
| + | | regular | ||
| + | | 120-250 bpm | ||
| + | | 75-200 bpm | ||
| + | | atria | ||
| + | | precedes QRS, p wave differs from sinus-p | ||
| + | | temporary AV-block | ||
| + | |- | ||
| + | ! [[#Atrio-Ventricular Reentry Tachycardia AVRT|AVRT - orthodromic]] | ||
| + | | regular | ||
| + | | 150-250 bpm | ||
| + | | 150-250 bpm | ||
| + | | circle: av-node - ventricles - bypass - atria | ||
| + | | RP < PR | ||
| + | | stops | ||
| + | |- | ||
| + | ! [[#AV junctional tachycardia|AV junctional tachycardia]] | ||
| + | | regular | ||
| + | | 60-100 bpm | ||
| + | | 70-130 bpm | ||
| + | | AV node | ||
| + | | RP < PR | ||
| + | | reduces rate | ||
| + | |- | ||
| + | |} | ||
Revision as of 07:48, 23 July 2007
Supraventricular Rhythms originate from the atria. Examples of supraventricular rhythms are:
- Atrial Premature Complexes
- Sinustachycardia
- Atrial Flutter
- Atrial Fibrillation
- Atrial Tachycardia
- AVNRT
- Atrio-ventricular Reentry Tachycardia AVRT
- AV junctional tachycardia
| regularity | atrial frequency | ventricular frequency | origin (SVT/VT) | p-wave | effect of adenosine | ||
|---|---|---|---|---|---|---|---|
| Narrow complex (QRS<0.12) | |||||||
| sinustachycardia | regular | 100-180 bpm | 100-180 bpm | sinusnode (SVT) | precedes every QRS complex | gradual slowing | |
| atrial fibrillation | grossly irregular | 400-600 bpm | 75-175 bpm | atria (SVT) | absent | slows down rate; irregularity remains | |
| atrial flutter | regular (sometimes alternating block) | 250-350 bpm | 75-150 bpm (3:1 or 2:1 block is most common) | atria (SVT) | negative sawtooth in lead II | temporary reduced conduction (e.g. 4:1) | |
| AVNRT | regular | 180-250 bpm | 180-250 bpm | AV-node (SVT) | in QRS complex (R') | stops | |
| Atrial tachycardia | regular | 120-250 bpm | 75-200 bpm | atria | precedes QRS, p wave differs from sinus-p | temporary AV-block | |
| AVRT - orthodromic | regular | 150-250 bpm | 150-250 bpm | circle: av-node - ventricles - bypass - atria | RP < PR | stops | |
| AV junctional tachycardia | regular | 60-100 bpm | 70-130 bpm | AV node | RP < PR | reduces rate | |