Practice ECG Rhythm Strips 102
Identify the following rhythms.
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Answers
1.
The rhythm is regular with a rate of 45/min. The P waves are absent. There may be some fibrillatory activity between the complexes or it may be artifact. The QRS complex is narrow suggesting a junctional focus. No ectopic beats are noted. PR: ---, QRS: .08 sec, QT: .44 sec.
2.
The rhythm is regular and the rate is 100/min. The P waves are upright, uniform, and have a corresponding QRS complex. No ectopic beats are present. PR: .20 sec, QRS: .08 sec, QT: .36 sec.
3.
The rhythm is irregular with some ventricular ectopy. The rate is 70/min. P waves are present and associated with a QRS complex. Two unifocal PVCs are present. PR: .18 sec, QRS: .08 sec, QT: .40 sec.
4.
The rhythm is regular with a rate of 58/min. There are atrial pacer spikes before each P wave. The PR interval is prolonged. No ectopic beats are present. PR: .32 sec, QRS: 10 sec, QT: .36 sec
5.
The rhythm is irregular with a rate of 70/min. The P waves are upright and precede each QRS complex. No ectopic beats are noted. The R-R interval between the 1st and 2nd complex is .68 sec and the R-R interval between the 3rd and 4th complexes is 1.0 sec. PR: .24 sec, QRS: .08 sec, QT: .28 sec.
1.
2.
3.
4.
5.
Answers
1.
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| Junctional rhythm (or atrial fibrillation with slow ventricular response) |
The rhythm is regular with a rate of 45/min. The P waves are absent. There may be some fibrillatory activity between the complexes or it may be artifact. The QRS complex is narrow suggesting a junctional focus. No ectopic beats are noted. PR: ---, QRS: .08 sec, QT: .44 sec.
2.
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| Normal sinus rhythm |
The rhythm is regular and the rate is 100/min. The P waves are upright, uniform, and have a corresponding QRS complex. No ectopic beats are present. PR: .20 sec, QRS: .08 sec, QT: .36 sec.
3.
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| Normal sinus rhythm with unifocal PVCs |
The rhythm is irregular with some ventricular ectopy. The rate is 70/min. P waves are present and associated with a QRS complex. Two unifocal PVCs are present. PR: .18 sec, QRS: .08 sec, QT: .40 sec.
4.
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| Atrial paced |
The rhythm is regular with a rate of 58/min. There are atrial pacer spikes before each P wave. The PR interval is prolonged. No ectopic beats are present. PR: .32 sec, QRS: 10 sec, QT: .36 sec
5.
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| Sinus arrhythmia with 1st degree block |
The rhythm is irregular with a rate of 70/min. The P waves are upright and precede each QRS complex. No ectopic beats are noted. The R-R interval between the 1st and 2nd complex is .68 sec and the R-R interval between the 3rd and 4th complexes is 1.0 sec. PR: .24 sec, QRS: .08 sec, QT: .28 sec.
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