Pre-Excitation - (PREX)

Definition

Any rhythm featuring early ventricular depolarization via an accessory pathway.

Priority

The priority of the annotation is determined by the severity of the event.

Priority	Highest	High	Medium	Low	Lowest
Continuous	-	-	-	-	-
Per Minute	-	-	-	-	-
Per Hour	-	-	-	-	-
Per 24 Hours	-	-	-	-	-

Compatibility

These annotations indicate whether they can overlap with other annotations, clarifying their exclusivity or compatibility.

Label	Description	Compatibility
UNK	Unclassifiable Beat	❌
AESC	Atrial Escape Beat	✅
NPW	Non-Conducted P-Wave (Blocked)	✅
APC	Atrial Premature Contraction	✅
ABER	Aberrated Beat	✅
BBLA	Left Anterior Fascicular Block Beat (Common)	✅
BBBI	Bifascicular Block Beat	✅
BBBL	Bilateral Bundle-Branch Block Beat	✅
BBU	Intraventricular Conduction Disturbance (Non-Specific Block)	✅
BBLP	Left Posterior Fascicular Block Beat (Rare)	✅
JESC	Junctional (Nodal) Escape Beat	❌
JPC	Junctional (Nodal) Premature Contraction	✅
LBB	Left Bundle Branch Block Beat	✅
N	Normal Beat	❌
RBB	Right Bundle Branch Block Beat	✅
RBBI	Incomplete Right Bundle Branch Block Beat	✅
VESC	Ventricular Escape Beat	❌
VPC	Ventricular Premature Contraction	❌
VPCF	Fusion Of Ventricular And Normal Beat	❌
RONT	R-On-T Premature Ventricular Beat	❌
Z	Noise Moderate	✅
ZZ	Noise Severe	❌
PAUS	Pause	✅
ABI	Atrial Bigeminy	✅
AERY	Atrial Ectopic Rhythm	✅
AFIB	Atrial Fibrillation	❌
AFLU	Atrial Flutter	❌
AAT	Automatic Atrial Tachycardia	✅
MAT	Multifocal Atrial Tachycardia	✅
PAT	Paroxysmal Atrial Tachycardia	✅
AVD	AV Dissociation	✅
AVDI	AV Dissociation With Interference	✅
AV1	First Degree AV Block	✅
AV2I	Second Degree AV Block Type I	✅
AV2II	Second Degree AV Block Type II	✅
AV3	Third Degree AV Block	❌
RECP	AV Reciprocating Tachycardia	❌
RNTR	Reentrant AV Nodal Tachycardia	❌
JRYA	Accelerated AV Junctional (Nodal) Rhythm	❌
JRYE	AV Junctional (Nodal) Escape Rhythm	❌
JT	Junctional Tachycardia	❌
LGL	Lown-Ganong-Levine Syndrome	✅
SA2I	Second Degree SA Block Type I	✅
SA2II	Second Degree SA Block Type II	✅
SA3	Third Degree SA Block	✅
ARHY	Sinus Arrhythmia	✅
SVT	Supraventricular Tachycardia (Atrial Or Junctional)	✅
TWA	T-Wave Alternans	✅
VAIR	Accelerated Idioventricular Rhythm	❌
VBI	Ventricular Bigeminy	✅
VFIB	Ventricular Fibrillation	❌
VFLU	Ventricular Flutter	❌
VRYI	Idioventricular (Ventricular Escape) Rhythm	❌
VTS	Slow Ventricular Tachycardia (Idioventricular Tachycardia)	❌
V2	Ventricular Couplet	❌
VTNP	Ventricular Tachycardia (Nonparoxysmal)	❌
PAVT	Ventricular Tachycardia (Paroxysmal)	❌
PLVT	Polymorphic Ventricular Tachycardia	❌
VTDP	Torsades De Pointes Ventricular Tachycardia	❌
VTRG	Ventricular Trigeminy	✅
WSP	Wandering Sinus Pacemaker Within The Sinus Node	✅
WPWA	Wolff-Parkinson Type A	✅
WPWB	Wolff-Parkinson Type B	✅
VPCI	Ventricular Interpolated Beat	❌
A2	Atrial Couplet	✅
ARYL	Lower Atrial Rhythm	✅
ARYM	Middle Atrial Rhythm	✅
ARYU	Upper Atrial Rhythm	✅
ATRG	Atrial Trigeminy	✅
A3	Atrial Triplet	✅
JBI	Junctional Bigeminy	❌
J2	Junctional Couplet	❌
JTRG	Junctional Trigeminy	❌
J3	Junctional Triplet	❌
V3	Ventricular Triplet	❌
BBB	Bundle Branch Block Beat
(Unspecified)	✅
BBTI	Trifascicular Block Beat	✅
LBBI	Incomplete Left Bundle Branch Block Beat	✅
SVE	Supraventricular Escape Beat (Least Specific)	✅
SVPC	Supraventricular Premature Contraction	✅
ZZZ	Noise (No Signal)	❌
AT	Atrial Tachycardia	✅
AVDC	Complete AV Dissociation	✅
AVDS	Isorhythmic AV Dissociation	✅
AV2	Second Degree AV Block	✅
BRDY	Bradycardia Of Any Type	✅
JRY	Av Junctional (Nodal) Rhythm	✅
LHRV	Low Heart Rate Variability	✅
PREX	Pre-Excitation	❌
BRDY	Sinus Bradycardia	✅
SRHY	Normal Sinus Rhythm	✅
TAHY	Sinus Tachycardia	✅
SVE	Supraventricular (Atrial Or Junctional) Ectopic Rhythm	✅
SVTP	Supraventricular Paroxysmal Tachycardia	✅
VRUN	Ventricular Run	❌
VPAR	Ventricular Parasystole	❌
VRY	Ventricular Rhythm	❌
MOVT	Monomorphic Ventricular Tachycardia	❌
WAP	Wandering Pacemaker From The Sinus Node To (And From) The A-V Node	✅
WPW	Wolff-Parkinson-White Syndrome	❌
A	Artifact	❌