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Identify the following rhythms. 1. 2. 3. 4. 5. Answers 1. 2nd degree heart block type II The rhythm is irregular.   The rate is 30/min.  There are upright, uniform P waves present but not all of them are associated with a QRS complex.  A non-conducted P wave follows each QRS complex.  The PR interval is constant on the conducted P waves.  There are two PVCs present, the 1st complex and the 4th complex.   PR:  .36 sec,  QRS:  .12 sec,  QT:  .48 sec.   Interpretation: 2nd degree heart block type II 2. Atrial flutter The rhythm is irregular with a rate of 90.   Flutter waves are present.  No ectopic beats are seen.  PR:---,  QRS:  .12 sec,  QT:.44 sec.   Interpretation:  Atrial flutter. 3. Atrial paced The rhythm is regular with a rate of 75/min.   A small...

Identify the following rhythms. 1. 2. 3. 4. 5. Answers 1. Complete heart block The rhythm is regular with a ventricular rate of 38/min.   There are small upright P waves present but they are not associated with a QRS complex.   The QRS complexes are wide suggesting a ventricular origin.   No ectopic beats are seen.   PR:  ---,  QRS:  .16 sec,  QT:  .40 sec. Interpretation:  Complete heart block 2. Normal sinus rhythm The rhythm is regular.   The rate is 75/min.   There are upright P waves before each QRS complex. Lead II shows 3mm ST segment depression with an inverted T wave.   No ectopic beats are seen. PR:  .16 sec,  QRS:  .08 sec,  QT:  .36 sec.  Interpretation:  Normal sinus rhythm 3. Normal sinus rhythm with a multifocal couplet This strip shows an arterial blood pressure waveform in the 2nd lead. ...

Identify the following rhythms. 1. 2. 3. 4. 5. Answers 1. 2nd degree AV block type I The rhythm is irregular with a rate of 60/min.   There are upright P waves present.   There is progressive elongation of the PR interval over successive beats.   A non-conducted P wave follows the 4th complex.   No ectopic beats are present.   The QRS complex is narrow.   PR:  .28/.32/.36 sec.  QRS:  .08 sec,  QT:  .44 sec.   Interpretation:  2nd degree AV block type I 2. Atrial paced rhythm  The rhythm is regular with a rate of 75/min.   There are small upright P waves that follow the atrial pacer spike.  No ectopic beats are seen.  PR:  .28 sec.  QRS:  .08 sec,  QT:  .34 sec.   Interpretation:  Atrial paced rhythm 3. NSR with a pause followed by a junctional escape beat  The rhythm is irregular.   The...

Identify the following rhythms. 1. 2. 3. 4. 5. Answers 1. 3rd degree heart block The rhythm is regular with a ventricular rate of 38/min.  There are small upright P waves present but they are not paired with a QRS complex.  The atrial rate is 65/min.   No ectopic beats are noted.   PR:  ---,  QRS:  .16 sec,  QT:  .44 sec.   Interpretation:  3rd degree heart block 2. Junctional rhythm The rhythm is regular with a rate of 38/min.   The P waves are absent.   The QRS complex is narrow.   No ectopic beats are seen.   PR:  ---,  QRS:  .08 sec,  QT:  .48 sec.   Interpretation: Junctional rhythm. 3. 1st degree AV block The rhythm is regular with a heart rate of 68/min.   The P waves are uniform, upright, and associated with a QRS complex.   The PR interval is prolonged.  No ectopic beats are...

Identify the following rhythms. 1. 2. 3. 4. 5. Answers 1. Atrial fibrillation with a PVC The rhythm is irregular with a rate of 60/min.   No P waves are present.   Fibrillation and flutter waves are present between the QRS complexes.  The 5th complex is a PVC.  There is some ST depression in  lead II.  PR:  ---,  QRS:  .08 sec,  QT:  .36 sec.   Interpretation:  Atrial fibrillation with a PVC 2. The rhythm is regular.   The heart rate is 48/min.  No P waves are seen.  The QRS complex is wide suggesting a ventricular origin for this rhythm.  No ectopic beats are noted.  PR:  ---,  QRS:  .12 sec,  QT:  .36 sec.  Interpretation:  Accelerated idioventricular rhythm. 3. NSR with a PVC triplet The rhythm is irregular due to the PVCs.   The rate is 90/min.  There are uprig...