Practice ECG Rhythm Strips 96

Identify the following rhythms.

1.

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Answers

1.

Bradycardia with 1st degree AV block

The rhythm is regular with a rate of 57/min.   The P waves are upright and precede each QRS complex.  The PR interval is prolonged.  No ectopic beats are present.   PR:  .24 sec,  QRS:  .12 sec,  QT:  .40 sec.


2.

Demand AV pacing

The rhythm is regular with a rate of 75/min.  The P waves are upright and associated with a QRS complex.   With the exception of the 2nd and 9th P waves, there are atrial pacer spikes before each P wave.  No ectopic beats are noted.  There are ventricular pacer spikes before each QRS complex.   PR:  .16 sec,  QRS:  .16 sec,  QT:  .44 sec.


3.

NSR with ventricular bigeminy

The rhythm is irregular due to the PVCs.   The P waves have a corresponding QRS complex and are uniform and upright.   There are unifocal PVCs every other beat in a bigeminal pattern.  A compensatory pause follows each PVC.  PR:  .16 sec,  QRS:  .12 sec,  QT:  .36 sec.


4.

NSR with PACs

The rhythm is regular due to the atrial ectopic beats.   The rate is 90/min.   The P waves precede a QRS complex but display some differences in morphology.   Premature atrial complexes are seen on the 2nd, 7th, 9th, and 10th complexes.   PR:  .20 sec,  QRS:  .08 sec,  QT:  .32 sec


5.

Ventricular tachycardia

The rhythm is regular with wide, monomorphic QRS complexes.  The rate is 166/min.  No P waves are present.