Practice EKG Rhythm Strips 189

Identify the following rhythms.

1.


2.


3.


4.


5.














Answers


1.
Atrial fibrillation with slow ventricular response

The rhythm is irregular with a ventricular rate of 50/min.   No P waves are seen but there is fibrillatory activity between the QRS complexes.   No ectopic beats are seen.   PR:  ---,  QRS:  .08 sec,  QT:  .42 sec.


2.
NSR with ventricular bigeminy

The rhythm is irregular with a rate of 70/min.   The P waves are upright, uniform, and paired with a QRS complex.   There are PVCs every other beat.   PR:  .20 sec,  QRS:  .12 sec,  QT: .44 sec


3.
Atrial fibrillation with ventricular demand pacing and a PVC


The rhythm is irregular.   The rate is 70/min.   No P waves are present.   There is a single PVC present, the 5th complex.   The 1st and 6th complexes are ventricular paced beats while the remaining complexes are the patient's own complexes.   PR:  ---,  QRS:  .12 sec,  QT:  .40 sec.

4.
1st degree AV block with a couplet and unifocal PVCs

The rhythm is irregular with a heart rate of 80/min.   There are upright P waves associated with the QRS complexes.  The P waves are split and wide suggesting left atrial enlargement.   Unifocal PVCs are seen singularly and in a couplet.  A PAC follows the couplet.  PR:  .22 sec,  QRS:  .08 sec,  QT:  .38 sec.



5.
Wide complex tachycardia with run of VT













The rhythm is irregular with a run of ventricular tachycardia.   The QRS complex is wide with an underlying rate of 166/min.  No P waves are present.   There may be P waves but they are fused with the T wave of the preceding complex.  PR:---,  QRS:  .16 sec,  QT:  .36 sec.

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