Interpret the following rhythm:

A) R-on-T phenomenon leading to ventricular fibrillation
B) Sinus rhythm with multifocal premature ventricular contractions
C) Nonsustained ventricular tachycardia
D) Sinus rhythm with bigeminal premature ventricular contractions

Question

Interpret the following rhythm:

A) R-on-T phenomenon leading to ventricular fibrillation 
B) Sinus rhythm with multifocal premature ventricular contractions 
C) Nonsustained ventricular tachycardia 
D) Sinus rhythm with bigeminal premature ventricular contractions

Quizplus · Accepted Answer

The peak of the T wave through the downslope of the T wave is considered the vulnerable period,which coincides with partial repolarization of the ventricles.If a PVC occurs during the T wave,ventricular tachycardia may occur.When the R wave of a PVC falls on the T wave of a normal beat,it is referred to as the R-on-T phenomenon.This strip does not show sinus rhythm,multi-focal PVCs (PVCs that are from different places in the heart and therefore look different),non-sustained ventricular tachycardia,or bigeminal premature ventricular contractions (where every other beat is a PVC).

Interpret the Following Rhythm