Supraventricular Rhythms

Author(s)	J.S.S.G. de Jong
Moderator	J.S.S.G. de jong
Supervisor
some notes about authorship

An overview of supraventricular tachycardias

An overview of supraventricular tachycardias

	example (lead II)	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	100-250 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

An overview of common supraventricular arrhythmias and their origin

Supraventricular ectopic beats

• Atrial Premature Complexes
• Wandering Pacemaker
• AV-nodal complexes

Also read

• Flowchart: Approach to the Narrow Complex Tachycardia Adapted from [1].
• Introduction to Arrhythmias
• Mechanisms of Arrhythmias
• Sinus node rhythms and arrhythmias
• Junctional Tachycardias
• Ventricular Arrhythmias

References

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