ECG Interpretation Exam

ANSWER KEY:

1. Regularity: irregular PRI: ≤.20 QRS: <.12 T Waves: uprightVentricular Rate: approx. 80 P Waves: upright ST Segment: normalRhythm Interpretation: sinus arrhythmia / sinus arrhythmia with aberrancy

2. Regularity: irregular PRI: ≤.20 QRS: <.12 T Waves: uprightVentricular Rate: approx. 90 P Waves: upright ST Segment: depressedRhythm Interpretation: ventricular bigeminy / sinus rhythm with bigeminal PVC

3. Regularity: regular PRI: changing QRS: ≥.12 T Waves: uprightVentricular Rate: approx. 50 P Waves: upright ST Segment: n/aRhythm Interpretation: 3 degree heart block / complete heart block

4. Regularity: regular PRI: ≤.20 QRS: <.12 T Waves: uprightVentricular Rate: approx. 150 P Waves: upright ST Segment: depressedRhythm Interpretation: sinus tachycardia

5. Regularity: regular PRI: changing QRS: <.12 T Waves: n/aVentricular Rate: approx. 78 P Waves: multiple, upright ST Segment: n/aRhythm Interpretation: atrial flutter / atrial flutter with 3:1 block

6. Regularity: regular PRI: can’t see QRS:can’t see T Waves: can’t seeVentricular Rate: approx. 78 P Waves: can’t see ST Segment: depressedRhythm Interpretation: artifact

7. Regularity: regular PRI: n/a QRS: <.12 T Waves: uprightVentricular Rate: approx. 70 P Waves:after QRS ST Segment: normalRhythm Interpretation: junctional / accelerated junctional

8. Regularity: regular PRI: ≤.20 QRS: <.12 T Waves: uprightVentricular Rate: approx. 42 P Waves: upright, extra ST Segment: depressedRhythm Interpretation: 2 degree Type II heart block / Mobitz II heart block

9. Regularity: regular PRI: none QRS: ≥.12 T Waves: n/aVentricular Rate: approx. 25 P Waves: none ST Segment: n/aRhythm Interpretation: idioventricular

10. Regularity: irregular PRI: ≤.20 QRS: <.12 T Waves: uprightVentricular Rate: approx. 80 P Waves: upright ST Segment: normal

1

Rhythm Interpretation: sinus rhythm with PAC’s / atrial bigeminy

11. Regularity: irregular PRI: >.20 QRS: <.12 T Waves: uprightVentricular Rate: approx. 75 P Waves: upright ST Segment: normalRhythm Interpretation: sinus rhythm with 1 degree AV Block / 1 degree heart block

12. Regularity: regular PRI: ≤.20 QRS: <.12 T Waves: uprightVentricular Rate: approx. 65 P Waves: upright ST Segment: normalRhythm Interpretation: sinus rhythm with PJC

13. Regularity: regular PRI: ≤.20 QRS: ≥.12 T Waves: uprightVentricular Rate: approx. 62 P Waves: upright ST Segment: depressedRhythm Interpretation: sinus rhythm with sinus arrest and BBB

14. Regularity: regular PRI: none QRS: ≥.12 T Waves: n/aVentricular Rate: approx. 180 P Waves: none ST Segment: n/alRhythm Interpretation: ventricular tachycardia / v-tach

15. Regularity: regular PRI: ≤.20 QRS: <.12 T Wave s: uprightVentricular Rate: approx. 42 P Waves: upright ST Segment: depressedRhythm Interpretation: sinus bradycardia

16. Regularity: regular PRI: changes QRS: <.12 T Waves: uprightVentricular Rate: approx. 90 P Waves: changes ST Segment: depressedRhythm Interpretation: wandering pacemaker / wandering atrial pacemaker

17. Regularity: regular PRI: none QRS: ≥.12 T Waves: uprightVentricular Rate: approx. 74 P Waves: none ST Segment: elevatedRhythm Interpretation: ventricular pacing / v-pacing

18. Regularity: irregular PRI: longer, longer QRS: <.12 T Waves: uprightVentricular Rate: approx. 50 P Waves: extra ST Segment: depressedRhythm Interpretation: 2 degree type I / Mobitz I / Wenkebach

19. Regularity: regular PRI: <.12 QRS: ≥.12 T Waves: uprightVentricular Rate: approx. 100 P Waves: inverted ST Segment: normalRhythm Interpretation: junctional tachycardia with BBB

20. Rhythm Interpretation: Torsades de Pointed / Torsades

21. Rhythm Interpretation: asystole / ventricular standstill / ventricular asystole

22. Rhythm Interpretation: agonal rhythm

23. Regularity: irregular PRI: none QRS: none T Waves: n/a

2

Ventricular Rate: approx. 300 P Waves: none ST Segment: n/aRhythm Interpretation: ventricular fibrillation / v-fib24. Regularity: irregular PRI: none QRS: <.12 T Waves: uprightVentricular Rate: approx. 70 P Waves: none ST Segment: normalRhythm Interpretation: atrial fibrillation / a-fib controlled ventricular response

25. Regularity: regular PRI: none QRS: ≥.12 T Waves: uprightVentricular Rate: approx. 70 P Waves: none ST Segment: n/aRhythm Interpretation: av pacemaker / dual chamber pacemaker

26. Regularity: regular PRI: <.20 QRS: ≥.12 T Waves: invertedVentricular Rate: approx. 77 P Waves: upright ST Segment: elevatedRhythm Interpretation: sinus rhythm with BBB

27. Rhythm Interpretation: ventricular pacing with failure to sense

28. Regularity: regular PRI: none QRS: <.12 T Waves: uprightVentricular Rate: approx. 160 P Waves: none ST Segment: normalRhythm Interpretation: atrial tachycardia / supraventricular tachycardia / SVT

29. Rhythm Interpretation: ventricular pacing with failure to pace

30. Rhythm Interpretation: extreme elevated ST / acute MI

3