Practice ECG Rhythm Strip 108
Identify the following rhythms.
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Answers
1.
The rhythm is regular with a rate of 83/min. The P waves are upright, uniform and precede the QRS complexes. The PR interval is prolonged. No ectopic beats are noted. PR: .30 sec, QRS: .10 sec, QT: .36 sec.
2.
The rhythm is irregular due to the PVCs. The rate is 100/min. The P waves are wide, uniform, and precede a QRS complex. Unifocal PVCs occur every fourth beat. PR: .12 sec, QRS: .12 sec, QT: .34 sec.
3.
The rhythm is irregular due to the pause. The rate is 80/min. Upright P waves come before each QRS complex. The P waves are wide suggesting left atrial enlargement. No ectopic beats are present but a .88 sec pause follows the 3rd complex. PR: .20 sec, QRS: .08 sec, QT: .36 sec.
4.
The rhythm is regular with a rate of 136/min. Upright P waves are present before each QRS complex. No ectopy is noted. PR: .12 sec, QRS: .08 sec, QT: .28 sec.
5.
The rhythm is regular with a rate of 40/min. P waves are present and uniform. There are nonconducted P waves present. The PR interval is consistent on the conducted beats. PR: .16 sec, QRS: .10 sec, QT: .44 sec.
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2.
3.
4.
5.
Answers
1.
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| 1st degree AV block |
The rhythm is regular with a rate of 83/min. The P waves are upright, uniform and precede the QRS complexes. The PR interval is prolonged. No ectopic beats are noted. PR: .30 sec, QRS: .10 sec, QT: .36 sec.
2.
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| Normal sinus rhythm with unifocal PVCs (quadrigeminy) |
The rhythm is irregular due to the PVCs. The rate is 100/min. The P waves are wide, uniform, and precede a QRS complex. Unifocal PVCs occur every fourth beat. PR: .12 sec, QRS: .12 sec, QT: .34 sec.
3.
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| Normal sinus rhythm with sinus arrest |
The rhythm is irregular due to the pause. The rate is 80/min. Upright P waves come before each QRS complex. The P waves are wide suggesting left atrial enlargement. No ectopic beats are present but a .88 sec pause follows the 3rd complex. PR: .20 sec, QRS: .08 sec, QT: .36 sec.
4.
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| Sinus tachycardia |
The rhythm is regular with a rate of 136/min. Upright P waves are present before each QRS complex. No ectopy is noted. PR: .12 sec, QRS: .08 sec, QT: .28 sec.
5.
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| 2nd degree AV block type II |
The rhythm is regular with a rate of 40/min. P waves are present and uniform. There are nonconducted P waves present. The PR interval is consistent on the conducted beats. PR: .16 sec, QRS: .10 sec, QT: .44 sec.
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