Ventricular Rhythms: Summary of Characteristics

What are the characteristics of PVCs?

Rhythm: Irregular because of early beats
Rate: Usually within normal range but depends on underlying rhythm
P waves: Usually absent or, with retrograde conduction to the atria, may appear after the QRS (usually upright in the ST segment or T wave)
PR Interval: None with the PVC because the ectopic beat originates in the ventricles
QRS: 0.12 sec or or greater

What are the characteristics of Ventricular escape beat?

Rhythm: Irregular because of late beats
Rate: Usually within normal range but depends on the underlying rhythm
P waves: Usually absent or, with retrograde conduction to the atria, may appear after the QRS
PR Interval: None because e the ectopic beat originates in the ventricles
QRS: Usually 0.12 sec or greater

What are the characteristics of Idioventricular rhythm?

Rhythm: Ventricular rhythm essentially regular
Rate: 20 to 40
P waves: Usually absent or, with retrograde conduction to the atria, may appear after the QRS
PR Interval: None
QRS: 0.11 sec or less unless abnormally conducted

What are the characteristics of Monomorphic VT?

Rhythm: Ventricular rhythm essentially regular
Rate: 101 to 250; 121 to 250 per some experts
P waves: often Usually not seen
PR Interval: None
QRS: 0.12 sec or greater

What are the characteristics of Polymorphic VT?

Rhythm: Ventricular rhythm may be regular or irregular
Rate: 150 to 300 beats/min
P waves: None
PR Interval: None
QRS: 0.12 sec or greater

What are the characteristics of Ventricular fibrillation?

Rhythm: Rapid, chaotic with no pattern or regularity
Rate: Not discernible
P waves: None
PR Interval: None
QRS: Absent

What are the characteristics of Asystole?

Rhythm: Ventricular not discernible; atrial may be discernible
Rate: Ventricular not discernible, but atrial activity may be observed
P waves: Usually none
PR Interval: None
QRS: Absent

What type of rhythm is PVCS?

Irregular due to early beats

What is the rate of PVCs?

Usually within normal range but depends on underlying rhythm (PVCs)

What are the P waves for PVCs like?

Usually absent or, with retrograde conduction to the atria, may appear after the QRS (usually upright in the ST segment or T wave)

What is the PR Interval of PVCs like?

None with the PVC because the ectopic beat originates in the ventricles

How long is the QRS with PVCs?

Usually 0.12 sec or greater (PVCs)

What type of rhythm in Ventricular escape beat?

Irregular because of late beats

What is the rate for Ventricular escape beat?

Usually within normal range but depends on the underlying rhythm (Ventricular escape beat)

What are the P waves like in Ventricular escape beat?

Usually absent or, with retrograde conduction to the atria, may appear after the QRS

What is the PR Interval like in Ventricular escape beat?

None because the ectopic beat originates in the ventricles

What is the QRS duration of Ventricular escape beat?

0.12 sec or greater (Ventricular escape beat)

What is the ventricular rhythm of Idioventricular rhythm?

Ventricular rhythm essentially regular

What is the rate of Idioventricular rhythm?

20 to 40

What do the P waves look like in Idioventricular rhythm?

Usually absent or, with retrograde conduction to the atria, may appear after the QRS

What is the PR Interval like with Idioventricular rhythm?

None (Idioventricular rhythm)

What is QRS for Idioventricular rhythm?

0.12 sec or greater (Idioventricular rhythm)

What is the rhythm of Accelerated idioventricular rhythm?

Ventricular rhythm essentially regular

What is the rate of Accelerated idioventricular rhythm?

41 to 100; 41 to 120 per some experts

What are P waves like for Accelerated idioventricular rhythm?

Usually absent or, with retrograde conduction to the atria, may appear after the QRS

What is the PR Interval for Accelerated idioventricular rhythm?

None (Accelerated idioventricular rhythm)

What is the QRS of Accelerated idioventricular rhythm?

0.12 sec or greater (Accelerated idioventricular rhythm)

What is the rhythm in Monomorphic VT?

Ventricular rhythm essentially regular

What is the rate of Monomorphic VT?

101 to 250 beats/min; 121 to 250 per some expert

What are the P waves like in Monomorphic VT?

Usually not seen (Monomorphic VT)

What is the PR Interval for Monomorphic VT?

None (Monomorphic VT)

What is the QRS for Monomorphic VT?

0.12 sec or greater (Monomorphic VT)

What is the rhythm of Polymorphic VT?

Ventricular rhythm may be regular or irregular

What are the P waves like for Polymorphic VT?

Usually not seen (Polymorphic VT)

What is the PR interval of Polymorphic VT?

None (Polymorphic VT)

What is the QRS of Polymorphic VT?

0.12 sec or greater (Polymorphic VT)

What is the rhythm for Ventricular fibrillation?

Rapid, chaotic with no pattern or regularity

What is the rate for Ventricular fibrillation?

Not discernible

What is the PR interval of Ventricular fibrillation?

None (Ventricular fibrilation)

What is the QRS for Ventricular fibrillation?

Not discernible

What is the rhythm for Asystole?

Ventricular rhythm not discernible; atrial may be discernible

What is the rate of Asystole?

Ventricular rate not discernible, but atrial activity may be observed

What are the P waves like for Asystole?

Usually none (Asystole)

What is the PR interval for Asystole?

None (Asystole

What is the QRS for Asystole?

Absent