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Identify the following rhythms. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18 19. 20. 21. 22. 23. 24. 25. Do you want to try another Basic EKG Rhythm Test? Click here Answers 01.    1st degree block 02.    2nd degree AV block type I 03.    Accelerated junctional rhythm 04.    Atrial fibrillation with slow ventricular response 05.    Atrial paced 06.    Complete heart block 07.    Junctional rhythm 08.    Normal sinus rhythm with PJCs 09.    Supraventricular tachycardia 10.    Sinus bradycardia 11.    Torsades de pointe 12.    Ventricular paced 13.    Ventricular

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 50/min.  There are upright P waves present but there is progressive lengthening of the PR interval.  A non-conducted P wave follows the 3rd complex.  No ectopic beats are present.  PR---,  QRS:  .08 sec,  QT:  .42 sec. 2. Normal sinus rhythm with a couplet of junctional beats and trigeminal PVCs The rhythm is irregular.   The rate is 80/min.  There are both upright and retrograde P waves present.   The P waves of the 2nd and 3rd complexes are negative while the P waves of the 5th, 6th, and 8th are sinus in origin.  There are trigeminal unifocal PVCs present.  PR:  .12 sec,  QRS:  .08 sec,  QT:  .40 sec. 3. Normal sinus rhythm with biphasic P waves The rhythm is regular with a rate of 78/min.   The P waves are biphasic.   No ectopic beats are noted.  PR:  .12 sec,

Identify the following rhythms. 1. 2. 3. 4. 5. Answers 1. 3rd degree heart block The rhythm is irregular.   The atrial rate is 68/min and the ventricular rate is around 35/min.  The P waves are upright but are not associated with the QRS complexes.  The 1st QRS complex is much narrower than the 2nd and 3rd.   This may be represent some kind of junctional escape mechanism.  PR:  ---,  QRS:  .14 sec,  QT:  52 sec. 2. Normal sinus rhythm  The rhythm is regular with a rate of 60/min.  The P waves have a biphasic morphology.  No ectopic beats are noted. There is 6mm ST elevation in lead II and ST depression and large Q waves in V1.  PR:  .16 sec,  QRS:  .12 sec,  QT:  .40 sec. 3. NSR with a PAC The rhythm is irregular due to a PAC.   The rate is 70/min.  The P waves are upright and precede the QRS complexes.  The 5th QRS complex occurs early in the cardiac cycle and has a P wave morphology that is different from the other P waves.

Identify the following rhythms. 1. 2. 3. 4. 5. Answers 1. Junctional rhythm The rhythm is regular.   The rate is 60.   The P waves are absent.  No ectopic beats are noted. PR: ---,  QRS:  .12 sec,  QT:  .44 sec 2. Multifocal atrial tachycardia The rhythm is irregular due to the many PACs.   The rate is 140/min.   There are upright P waves present of differing morphology.   Some P waves are buried with the T wave of the previous complexes.  To be multifocal atrial tachycardia there needs to be at least three P waves of various morphology with a ventricular rate over 100/min.  PR---,  QRS:  .08,  QT:  .32 sec 3. Normal sinus rhythm with sinus pause The rhythm is irregular due to the pause.   The rate is 60/min.   The P waves are upright and are associated with a QRS complex.  There is some ST depression and inversion of the T wave.  No ectopic beats are present.  There is a 1.