Medical Student Review ECG Answers
1. Atrial Fibrillation, LVH (Voltage, and repolarization in lateral leads. The ST-T
wave changes are minor, but present in V6). Notice the one paced beat and PVC
in leads V1-V3.
2. Atrial Flutter, LVH (voltage and repol change and LAD), Anteroseptal MI, age
undetermined, Inferior MI, age undetermined (Qs in V1-V3 and the inferior
leads).
3. Normal sinus rhythm with normal intervals and axis. Antero-lateral MI, acute(Qs
in V2-V6); Inferior MI, possibly acute (some minor residual ST elevation).
4. Accelerated junctional rhythm (notice retrograde p waves, especially seen in V3
on top of the T waves), prolonged QT interval. Non-specific intraventricular
conduction delay (mildly prolonged QRS).
5. Normal sinus rhythm. Prolonged QRS. Right Bundle Branch Block.
6. Wide complex tachycardia consistent with ventricular tachycardia.
7. Normal Sinus rhythm. Left Axis deviation. Left Bundle Branch Block.
8. Normal sinus rhythm. WPW. Notice short PR interval with a delta wave.
9. Accelerated junctional rhythm. LVH with repolarization change.
10. High grade 2nd degree AV block. Voltage criteria for LVH in aVL.
11. Normal sinus rhythm. Inferior MI, possibly acute. Lateral ischemia.
12. Normal sinus rhythm. Acute anterior MI. Minor ST depression in the inferior
leads indicates reciprocal change.
13. Normal sinus rhythm. Normal ECG! Yes. really…
14. Normal sinus rhythm. Right axis deviation. RVH with repolarization change.
LAO or possibly biatrial overload.
Rhythms:
1. Type I 2nd degree AV block
2. Ventricular tachycardia
3. Sinus rhythm with frequent pacs (notice large T waves-the P waves are buried in
them.
4. High grade AV block, likely 2nd degree type II
5. Accelerated idioventricular rhythm
6. Atrial flutter
7. High grade AV block, likely 2nd degree type II
8. Torsades de pointes
9. First degree AV block PR = 0.58 sec
10. Third degree AV block
11. Ventricular tachycardia—notice dissociated P waves and QRS complexes
12. Coarse atrial fibrillation
13. Normal sinus rhythm with frequent PVCs (ventricular bigeminy)
14. Ventricular fibrillation (some may call it v. flutter)
15. Third degree AV block with a ventricular escape rhythm
16. Atrial fibrillation (fine)