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Identify the following rhythms. 1. 2. 3. 4. 5. Answers 1. Sinus tachycardia with a wandering baseline The rhythm appears regular.   There is wander baseline.  Probably respiratory chest wall movement.  The rate is 150/min.   The P waves are upright and precede each QRS complex.  No ectopic beats are noted.  PR:  .16 sec,  QRS:  .08 sec,  QT:  .28 sec. 2. Normal sinus rhythm with sinus arrest Except for the pause, the underlying rhythm is regular.   The rate is 70/min.  (7 R waves X 10).  There are uniform, upright P waves before each QRS complex.  There is a 1.6 sec pause that begins the strip.  No ectopic beats are noted.  PR:  .20 sec,  QRS:  .12 sec,  QT:  .40 sec. 3. Normal sinus rhythm with muscle tremor artifact The rhythm is regular with a rate of 83/min.  The...

Identify the following rhythms. 1. 2. 3. 4. 5. Answers 1. Accelerated junctional rhythm The rhythm is regular with a rate of 65/min.   There are negative P waves that precede each QRS complex.  No ectopic beats are noted.  PR:  .12 sec,  QRS:  .08 sec,  QT:  .40 sec. 2. Demand pacing with PACs  The rhythm is irregular with a rate of 80/min.  There are atrial and ventricular pacer spikes present on beats 1, 3, 5, and 7.   There are early beats every other beat which have only a ventricular pacer spike.  These beats appear to be PACs.   If you look at the 8th complex there is a P wave that precedes the QRS complex.  The 5th complex has a taller T wave than the other T waves which suggests that a P wave is buried within it. 3. Normal sinus rhythm with a dropped premature beat and escape beats The rhythm is irregular with a ...

Identify the following rhythms. 1. 2. 3. 4. 5. Answers 1. Normal sinus rhythm with bigeminal PACs The rhythm is irregular with a rate of 90/min.   The P waves are upright and precede each QRS complex.   After the 2nd complex, there are PACs every other beat.   The P waves of the PACs have a different shape, morphology, than the sinus P waves.  PR:  .12 sec,  QRS:  .08 sec,  QT:  .36 sec. 2. Normal sinus rhythm with a PJC The rhythm is irregular due to the PJC.   The rate is 70/min.   The P waves are associated with a QRS complex.  The P wave of the 5th complex is negative.  PR:  .16 sec,  QRS:  .08 sec,  QT:  .32 sec. 3. Normal sinus rhythm with unifocal PVCs The rhythm is irregular due to the PVCs.  ...

Identify the following rhythms. 1. 2. 3. 4. 5. Answers 1. Normal sinus rhythm with 1st degree block The rhythm is regular with a rate of 94/min.  The P waves are upright and precede the QRS complexes.  The PR interval is prolonged.  No ectopic beats are noted.  PR:  .28 sec.  QRS:  .12 sec,  QT:  .36 sec. 2. Atrial fibrillation The rhythm is irregular with a rate of 80/min.  No P waves are present.  There are fibrillatory waves between each QRS complex.  No ectopic beats are noted.   PR:  ---,  QRS:  .08 sec,  QT:  .36 sec. 3. Sinus tachycardia with a PVC The rhythm is irregular due to the PVC.   The rate is 110/min.  There are upright P waves that precede each QRS complex.  A single PVC is present.  PR:  .16 sec,  QRS:  .16 sec,  QT:  .36 sec....

Identify the following rhythms. 1. 2. 3. 4. 5. Answers 1. Normal sinus rhythm with 1st degree block The rhythm is regular with a rate of 88/min.   The P waves are upright and precede the QRS complexes.   The PR interval is prolonged.  No ectopic beats are noted.  PR:  .28 sec,  QRS:  .08 sec,  QT:  .36 sec. 2. Sinus tachycardia with trigeminal PVCs The rhythm is irregular due to the PVCs.   The rate is 110/min.   The P waves are broad and upright and are associated with a QRS complex.  The ectopic PVCs appear to be fused with a sinus P wave.  The R wave of the PVC looks like it begins on what would be a P wave.  If you measure the P-P distance they "march" through the ventricular ectopic beats.  There are trigeminal PVCs.   PR:  .20 sec,  QRS:  .08 sec,  QT:  .36 sec. 3. Atrial fibrillation wit...