Supraventricular Rhythms
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Supraventricular Rhythms originate from the atria. Examples of supraventricular rhythms are:
- Atrial Premature Complexes
- Sinustachycardia
- Atrial Rhythm
- Atrial Flutter
- Atrial Fibrillation
- Atrial Tachycardia
- AVNRT
- Atrio-ventricular Reentry Tachycardia AVRT
- AV junctional tachycardia
- Wandering Pacemaker
- AV-nodal complexes
Also read:
- Flowchart: Approach to the Narrow Complex Tachycardia Adapted from [1].
- Mechanisms of Arrhythmias
- Ventricular Arrhythmias
- Sinus node rhythms and arrhythmias
| 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 | |
| Atrio-Ventricular Reentry Tachycardia (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 | |
| Wide complex (QRS>0.12) | |||||||
| Supraventricular tachycardia with block | (ir)regular depending on SVT | 150-250 bpm | 75-200 bpm | atria (SVT) | absent | temporary increased AV-block (eg 4:1) | |
| Atrio-ventricular Reentry Tachycardia (AVRT) - antidrome | regular | 150-250 bpm | 150-250 bpm | circular: bypass - atria - av-node - ventricles | RP < PR | stops | |
References
- Blomström-Lundqvist C, Scheinman MM, Aliot EM, Alpert JS, Calkins H, Camm AJ, Campbell WB, Haines DE, Kuck KH, Lerman BB, Miller DD, Shaeffer CW, Stevenson WG, Tomaselli GF, Antman EM, Smith SC Jr, Alpert JS, Faxon DP, Fuster V, Gibbons RJ, Gregoratos G, Hiratzka LF, Hunt SA, Jacobs AK, Russell RO Jr, Priori SG, Blanc JJ, Budaj A, Burgos EF, Cowie M, Deckers JW, Garcia MA, Klein WW, Lekakis J, Lindahl B, Mazzotta G, Morais JC, Oto A, Smiseth O, Trappe HJ, and European Society of Cardiology Committee, NASPE-Heart Rhythm Society. ACC/AHA/ESC guidelines for the management of patients with supraventricular arrhythmias--executive summary. a report of the American college of cardiology/American heart association task force on practice guidelines and the European society of cardiology committee for practice guidelines (writing committee to develop guidelines for the management of patients with supraventricular arrhythmias) developed in collaboration with NASPE-Heart Rhythm Society. J Am Coll Cardiol. 2003 Oct 15;42(8):1493-531. DOI:10.1016/j.jacc.2003.08.013 |