Practice EKG Rhythm Strips 155

Identify the following rhythms.

1.

2.

3.

4.

5.

Answers

1.

There is AV dissociation.  The atrial rate is regular with a rate of 107/min and a ventricular rate of 32/min.  The P waves are positive and uniform but have no relationship to a QRS complex.  No ectopic beats are present.  PR:  ---,  QRS:  .16 sec,  QT:  .66 sec.

2.

The rhythm is irregular.  The rate is 70/min.  The P waves are splint but are associated with a QRS complex.  The 3rd complex occurs early and has a change in the P wave morphology.   This is especially evident in the lower V1 lead.  This is followed by a junctional escape beat, 4th complex,  then a sinus beat.   The 6th complex is another PAC.   This is followed by another sinus looking beat.  PR:  .20 sec,  QRS:  .10 sec,  QT:  .40 sec.

3.

Junctional rhythm

The rhythm is regular with a rate of 50/min.  Retrograde P waves precede the QRS complex.  No ectopic beats are present.  PR:  .12 sec,  QRS;  .06 sec,  QT:  .32 sec.

4.

1st degree block with a PVC

 The rhythm is regular.   The rate is 83.   There are upright P waves before each QRS complex.  The PR interval is prolonged at .24 sec.   The QRS complex is wide .12 sec.   The QT interval is .40 sec.

5.

Sinus arrhythmia

The rhythm is irregular.   The rate is 60.   There are upright P waves before each QRS complex.  No ectopic beats are present.  The PR:  .16 sec,   QRS: .08 sec,  QT: .40 sec.