CRAT Ventricular Arrhythmia Identification 2

Question 1

A premature ventricular complex (PVC) is recognized on ECG by which characteristic?

Accepted Answer

Wide QRS greater than 120 ms appearing earlier than expected with a compensatory pause and no preceding P wave

Answer

Narrow QRS appearing early with a preceding P wave

Answer

Wide QRS with a normal preceding P wave and normal PR interval

Answer

Regular wide complex at exactly 60 bpm

Question 2

PVCs occurring in pairs (two consecutive PVCs) are referred to as which term?

Accepted Answer

Couplets

Answer

Bigeminy

Answer

Trigeminy

Answer

Salvos

Question 3

Monomorphic ventricular tachycardia is distinguished from polymorphic VT by which feature?

Accepted Answer

Monomorphic VT has QRS complexes of uniform appearance; polymorphic VT has QRS complexes that change in morphology and axis

Answer

Monomorphic VT is always slower than polymorphic VT

Answer

Monomorphic VT always requires defibrillation

Answer

Polymorphic VT is associated with a narrow QRS

Question 4

What is the minimum number of consecutive ventricular beats at 100 bpm or greater required to define ventricular tachycardia?

Accepted Answer

Three or more consecutive beats

Answer

Two consecutive beats

Answer

Five or more consecutive beats

Answer

Ten or more consecutive beats

Question 5

PVCs occurring in a pattern of one PVC for every normal beat are called what?

Accepted Answer

Ventricular bigeminy

Answer

Ventricular trigeminy

Answer

Couplets

Answer

Ventricular quadrigeminy

Question 6

The R-on-T phenomenon in PVCs is dangerous because it does which of the following?

Accepted Answer

A PVC occurring during the vulnerable period of ventricular repolarization (T wave peak) can initiate ventricular fibrillation

Answer

It causes sinus node suppression

Answer

It produces AV block

Answer

It prolongs the PR interval