Practice EKG Rhythm Strips 224
Identify the following rhythms.
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Answers
1.
The rhythm is irregular with a rate of 40/min. The P waves are upright and uniform but as you can see not all of them are associated with a QRS complex. The PR interval is consistent on the conducted beats. The QRS complex is narrow. No ectopic beats are noted. PR: .20 sec. QRS: .08 sec. QT: .44 sec. Interpretation: 2nd degree AV block type II
2.
This 60 cycle electrical interference.
3.
The rhythm is regular with a rate of 53/min. There are flutter waves present. The QRS complex is narrow. No ectopic beats are noted. PR: ---, QRS: .08 sec, QT: .44 sec. Interpretation: Atrial flutter
4.
The rhythm is irregular. The rate is 60/min. Small upright P waves are present. Most of the P waves are preceded by an atrial pacer spike. The P wave of the 4th complex does is not preceded by an atrial pacer spike. The ST segment is down slopping with an inverted T wave. In lead V1 there is 1 mm ST elevation. No ectopic beats are noted. PR: .20 sec, QRS: .10 sec, QT: .44 sec. Interpretation: Demand atrial pacing
5.
The rhythm is irregular. There are upright P waves present. The P waves are associated with a QRS complex. The P wave of the 6th complex is smaller than the other P waves. It may be from an ectopic source. Ventricular escape beats are seen following the 3rd and 5th complexes. PR: .20 sec, QRS: .08 sec, QT: .40 sec. Interpretation: Normal sinus rhythm with ventricular escape beats.
1.
2.
3.
4.
5.
Answers
1.
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| 2nd degree AV block type II |
The rhythm is irregular with a rate of 40/min. The P waves are upright and uniform but as you can see not all of them are associated with a QRS complex. The PR interval is consistent on the conducted beats. The QRS complex is narrow. No ectopic beats are noted. PR: .20 sec. QRS: .08 sec. QT: .44 sec. Interpretation: 2nd degree AV block type II
2.
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| 60 cycle electrical interference |
This 60 cycle electrical interference.
3.
The rhythm is regular with a rate of 53/min. There are flutter waves present. The QRS complex is narrow. No ectopic beats are noted. PR: ---, QRS: .08 sec, QT: .44 sec. Interpretation: Atrial flutter
4.
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| Demand atrial pacing |
The rhythm is irregular. The rate is 60/min. Small upright P waves are present. Most of the P waves are preceded by an atrial pacer spike. The P wave of the 4th complex does is not preceded by an atrial pacer spike. The ST segment is down slopping with an inverted T wave. In lead V1 there is 1 mm ST elevation. No ectopic beats are noted. PR: .20 sec, QRS: .10 sec, QT: .44 sec. Interpretation: Demand atrial pacing
5.
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| Normal sinus rhythm with ventricular escape beats. |
The rhythm is irregular. There are upright P waves present. The P waves are associated with a QRS complex. The P wave of the 6th complex is smaller than the other P waves. It may be from an ectopic source. Ventricular escape beats are seen following the 3rd and 5th complexes. PR: .20 sec, QRS: .08 sec, QT: .40 sec. Interpretation: Normal sinus rhythm with ventricular escape beats.
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