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ECG Rules:)

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Question
Answer
Sinus Rhythm Rate   60-100 BPM  
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Sinus Rhythm Rhythm   Regular  
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Sinus Rhythm Pwaves   (+),One For Every QRS  
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Sinus Rhythm PRI   0.12-0.20 sec  
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Sinus Rhythm QRS   0.10 sec or less, unless abnormally conducted  
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Sinus Bradycardia Rate   Less Than 60 BPM  
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Sinus Bradycardia Rhythm   Regular  
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Sinus Bradycardia Pwaves   (+),One For Every QRS  
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Sinus Bradycardia PRI   0.12-0.20 sec  
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Sinus Bradycardia QRS   0.10 sec or less, unless abnormally conducted  
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Sinus Tachycardia Rate   101-180 BPM  
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Sinus Tachycardia Rhythm   Regular  
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Sinus Tachycardia Pwaves   (+),One For Every QRS  
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Sinus Tachycardia PRI   0.12-0.20 sec  
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Sinus Tachycardia QRS   0.10 sec or less, unless abnormally conducted  
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Sinus Arrhythmia Rate   Usually 60-100 BPM  
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Sinus Arrhythmia Rhythm   Irregular, Typically Phasic with Respirations  
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Sinus Arrhythmia Pwaves   (+),One For Every QRS  
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Sinus Arrhythmia PRI   0.12-0.20 sec  
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Sinus Arrhythmia QRS   0.10 sec or less, unless abnormally conducted  
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SA Block Rate   Varies  
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SA Block Rhythm   Regular Except For The Event; Drops A P-P Interval  
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SA Block Pwaves   When Present,(+),One For Every QRS  
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SA Block PRI   When Present,0.12-0.20 sec  
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SA Block QRS   0.10 sec or less, unless abnormally Conducted  
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Sinus Arrest Rate   Varies  
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Sinus Arrest Rhythm   Regular Except For The Event; Pause Of Undetermined Length  
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Sinus Arrest Pwaves   When Present,(+),One For Every QRS  
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Sinus Arrest PRI   When Present, 0.12-0.20 sec  
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Sinus Arrest QRS   0.10 sec or less, unless abnormally Conducted  
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PACs Rate   Usually Within Normal Range, But Depends On Underlying Rhythm  
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PACs Rhythm   Regular With Premature Beats  
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PACs Pwaves   Premature,(+), One For Every QRS, Differ Than Sinus Pwaves, Maybe Lost In Preceding Twave  
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PACs PRI   Maybe Normal Or Prolonged  
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PACs QRS   0.10 sec or Less Unless Abnormally Conducted  
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Wandering Atrial Pacemaker Rate   Usually 60-100 BPM; If Rate Greater Than 100 BPM, Rhythm Is Called Multifocal Atrial Tachycardia  
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Wandering Atrial Pacemaker Rhythm   Maybe Irregular As Pacemaker Site Shifts From SA Node To Ectopic Atrial Locations And AV Junction  
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Wandering Atrial Pacemaker Pwaves   Size, Shape, And Direction mau Change From Beat To Beat  
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Wandering Atrial Pacemaker PRI   Varies  
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Wandering Atrial Pacemaker QRS   0.10 sec Or Less Unless Abnormally Conducted  
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Atrial Tachycardia Rate   100-250 BPM  
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Atrial Tachycardia Rhythm   Regular  
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Atrial Tachycardia Pwaves   Atrial Pwaves Differ From Sinus Pwaves; Isoelectric Baseline Usually Present Between Pwaves  
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Atrial Tachycardia PRI   Maybe Shorter Or Longer Than Normal  
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Atrial Tachycardia QRS   0.10 Sec Or Less Unless Abnormally Conducted  
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AVNRT Rate   150-250 BPM  
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AVNRT Rhythm   Ventricular Rhythm Is Usually Very Regular  
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AVNRT Pwaves   Pwaves Often Hidden In QRS Complex  
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AVNRT PRI   If Pwaves Are Seen, The PRI Will Usually 0.12-0.20sec  
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AVNRT QRS   0.10 sec or Less Unless Abnormally Conducted  
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Atria Flutter Rate   Atrial Rate 250-450BPM, Typically 300BPM, Ventricular Rate Variable-Determined By AV Blockade  
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Atria Flutter Rhythm   Atrial Regular, Ventricular Regular or irregular  
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Atria Flutter Pwaves   No Identifiable P Waves; Saw-toothed "flutter" Waves Present  
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Atria Flutter PRI   Not Measurable  
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Atria Flutter QRS   0.10 sec or less unless abnormally Conducted  
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AFib Rate   Atrial Rate 400-600 BPM; Ventricular Rate Variable  
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AFib Rhythm   Ventricular Rhythm Usually Irregularly Irregular  
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AFib Pwaves   No Identifiable Pwaves; Fibrillatory waves present; erratic, Wavy Baseline  
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AFib PRI   Not measurable  
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AFib QRS   0.10 sec or less unless abnormally conducted  
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WPW Rate   60-100 BPM, if the underlying rhythm is sinus in origin  
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WPW Rhythm   Regular, unless associated with Atrial Fibrillation  
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WPW Pwaves   Normal and (+) in lead II unless WPW is associated with AFib  
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WPW PRI   If Pwaves are seen, Less than 0.12sec  
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WPW QRS   Usually greather than 0.12 sec. Delta wave may be seen in one or more leads  
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PJCs Rate   usually within normal range, but depends on underlying rhythm  
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PJCs Rhythm   Regular with premature beats  
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PJCs Pwaves   may occur before, during, or after QRS, if visiable, the Pwave is Inverted in leads II, III, and aVF  
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PJCS PRI   If Pwave occurs before the QRS, the PRI will usually be 0.12 sec or less; if no p wave occurs before The QRS, there will be no PRI  
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PJCs QRS   Usually 0.10sec or less unless it is aberrantly conducted or an intraventricular conduction delay exists  
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Junctional Escape Beat Rate   usually within normal range, but depends on underlying rhythm  
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Junctional Escape Beat Rhythm   Regular with Late Beats  
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Junctional Escape Beat Pwaves   may occur before, during, or after QRS, if visiable, the Pwave is Inverted in leads II, III, and aVF  
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Junctional Escape Beat PRI   If Pwave occurs before the QRS, the PRI will usually be 0.12 sec or less; if no p wave occurs before The QRS, there will be no PRI  
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Junctional Escape Beat QRS   Usually 0.10sec or less unless it is aberrantly conducted or an Intraventricular conduction delay exists  
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Junctional Escape Rhythm Rate   40-60 BPM  
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Junctional Escape Rhythm Rhythm   Regular  
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Junctional Escape Rhythm Pwaves   may occur before, during, or after QRS, if visiable, the Pwave is Inverted in leads II, III, and aVF  
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Junctional Escape Rhythm PRI   If Pwave occurs before the QRS, the PRI will usually be 0.12 sec or less; if no p wave occurs before The QRS, there will be no PRI  
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Junctional Escape Rhythm QRS   Usually 0.10 sec or less unless it is aberrantly conducted or an Intraventricular conduction delay exists  
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Accelerated Junctional Rhythm Rate   61-100 BPM  
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Accelerated Junctional Rhythm Rhythm   Regular  
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Accelerated Junctional Rhythm Pwaves   may occur before, during, or after QRS, if visiable, the Pwave is Inverted in leads II, III, and aVF  
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Accelerated Junctional Rhythm PRI   If Pwave occurs before the QRS, the PRI will usually be 0.12 sec or less; if no p wave occurs before The QRS, there will be no PRI  
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Accelerated Junctional Rhythm QRS   Usually 0.10sec or less unless it is aberrantly conducted or an Intraventricular conduction delay exists  
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Junctional Tachycardia Rate   101-180 BPM  
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Junctional Tachycardia Rhythm   Regular  
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Junctional Tachycardia Pwaves   may occur before, during, or after QRS, if visiable, the Pwave is Inverted in leads II, III, and aVF  
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Junctional Tachycardia PRI   If Pwave occurs before the QRS, the PRI will usually be 0.12 sec or less; if no p wave occurs before The QRS, there will be no PRI  
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Junctional Tachycardia QRS   Usually 0.10sec or less unless it is aberrantly conducted or an Intraventricular conduction delay exists  
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PVCs Rate=   Usually within normal range, but depends on underlying rhythm  
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PVCs Rhythms=   regular with early beats  
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PVCs Pwaves=   usually absent or, with retrograde conduction to the atria, may appears after the QRS(usually upright in ST-segment or Twaves)  
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PVCs PRI=   none  
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PVCs QRS=   usually 0.12 sec or greater  
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Ventricular Escape Beat Rate   Usually within normal range, but depends on underlying rhythm  
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Ventricular Escape Beat Rhythm   usually 0.12 sec or greater  
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Ventricular Escape Beat Pwaves   usually absent or, with retrograde conduction to the atria, may appears after the QRS(usually upright in ST-segment or Twaves)  
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Ventricular Escape Beat PRI   none  
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Ventricular Escape Beat QRS   usually 0.12 sec or greater  
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IVR Rate   20-40 BPM  
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IVR Rhythm   Essentially Regular  
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IVR Pwaves   usually absent or, with retrograde conduction to the atria, may appears after the QRS(usually upright in ST-segment or Twaves)  
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IVR PRI   none  
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IVR QRS   usually 0.12 sec or greater  
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AVR Rate   41-100 BPM (Some Consider the rate 41-120 BPM)  
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AVR Rhythm   Essentially Regular  
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AVR Pwaves   usually absent or, with retrograde conduction to the atria, may appears after the QRS(usually upright in ST-segment or Twaves)  
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AVR PRI   none  
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AVR QRS   usually 0.12 sec or greater  
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Monomorphic VT Rate   101-250 BPM (some Consider 121-250 BPM)  
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Monomorphic VT Rhythm   Usually Regular  
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Monomorphic VT Pwaves   May be present or absent. If present, they have no set relationship to the QRS appearing between the QRSs at a rate different from that of the VT  
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Monomorphic VT PRI   None  
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Monomorphic VT QRS   0.12 sec or greater  
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Polymorphic VT Rate   150-300 BPM  
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Polymorphic VT Rhythm   Irregular  
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Polymorphic VT Pwaves   Inderpendent or none  
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Polymorphic VT PRI   none  
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Polymorphic VT QRS   0.12 sec or greater  
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VFib Rate   not discernible  
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VFib Rhythm   chaotic  
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VFib Pwaves   absent  
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VFib PRI   none  
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VFib QRS   not discernible  
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Asystole Rate   none  
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Asystole Rhythm   none  
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Asystole Pwaves   atrial activiy may be observed ('Pwaves asystole")  
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Asystole PRI   none  
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Asystole QRS   absent  
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1sr-Degree AVB Rate   usually within normal range, but depends on underlying rhythm  
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1st-Degree AVB Rhythm   atrial regular, ventricular regular  
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1st-Degree AVB Pwaves   normal, one for every QRS  
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1st-Degree AVB PRI   Greater than 0.20 sec and constant  
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1st-Degree AVB QRS   usually 0.10 sec or less unless an intraventricular conduction delay exists  
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2nd-Degree AVB Type I Rate   atrial rate greater than ventricular rate; both often within normal limits  
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2nd-Degree AVB Type I Rhythm   atrial regular, ventricular irregular  
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2nd-Degree AVB Type I Pwaves   normal in size and shape, some pwaves are not followed by a QRS (more Pwaves Than QRS)  
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2nd-Degree AVB Type I PRI   lengthens with each cycle until a pwave appears without a QRS  
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2nd-Degree AVB Type I QRS   usually 0.10 sec or less unless an intraventricular conduction delay exists  
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2nd-Degree AVB Type II Rate   atrial rate greater than ventricular rate; ventricular rate often slow  
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2nd-Degree AVB Type II Rhythm   atrial regular, ventricular often slow  
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2nd-Degree AVB Type II Pwaves   normal in size and shape, some pwaves are not followed by a QRS (more Pwaves Than QRS)  
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2nd-Degree AVB Type II PRI   normal or slightly prolonged but constand for conducted beats  
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2nd-Degree AVB Type II QRS   usually greater than 0.10 sec, periodically absent after pwaves  
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2nd-Degree AVB 2:1 Rate   atial rate greater than ventricular  
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2nd-Degree AVB 2:1 Rhythm   atrial regular, ventricular regular  
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2nd-Degree AVB 2:1 Pwaves   normal in size and shape, some pwaves are not followed by a QRS (more Pwaves Than QRS)  
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2nd-Degree AVB 2:1 PRI   normal in size and shape, every other pwave is not followed by a QRS (More Pwaves Than QRS)  
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2nd-Degree AVB 2:1 QRS   constant  
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3rd-Degree AVB Rate   atrial rate greater than ventricular rate; ventricular rate determined by origin of escape thythm  
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3rd-Degree AVB Rhythm   atrial regular, ventricular regular  
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3rd-Degree AVB Pwaves   normal in size and shape, some pwaves are not followed by a QRS (more Pwaves Than QRS)  
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3rd-Degree AVB PRI   none- the atria and ventricular beat independently of eavh other. therefor no true PRI  
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3rd-Degree AVB QRS   Narrow or wide depending on the location of escape pacemaker and condition of intraventricular conduction system  
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