Practice EKG Rhythm Strips 136
Identify the following rhythms.
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Answers
1.
The rhythm is regular. The rate is 93. There are upright P waves before each QRS complex. No extra beats are present. PR: .16 sec, QRS: .08 sec, QT: .44 sec
2.
The rhythm is irregular because of the PVCs. The rate is 80/min. There are wide upright P waves before each sinus beat. The PR interval is prolonged. There are unifocal PVCs that occur every 3rd beat. This is followed by a compensatory pause. PR: .24 sec, QRS: .12 sec, QT: 48 sec.
3.
The rhythm is regular except for the PVC. The calculated rate is 78/min. The P waves are upright and precede the QRS complexes. There is a single fusion beat PVC present. Notice the small P wave that precedes the PVC. A sinus beat and a ventricular beat are initiated at nearly the same time. PR: .20 sec, QRS; .08 sec QT: .44 sec.
4.
The rhythm is irregular. The R-R interval between the 1st and 2nd complex is .60 sec and the R-R interval between the 9th and 10th complex is 1 sec. The P waves are upright and precede each QRS complex. The P waves of the 10th-13th complexes are smaller than the earlier complexes. No ectopic beats are noted. PR: .20 sec. QRS: .08 sec, QT: .32 sec.
5.
The rhythm is regular. The rate is 166/min. Upright, uniform P waves precede the QRS complexes. No ectopy is noted. PR: .12 sec, QRS: .08 sec, QT: .24 sec
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2.
3.
4.
5.
Answers
1.
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| Normal sinus rhythm |
The rhythm is regular. The rate is 93. There are upright P waves before each QRS complex. No extra beats are present. PR: .16 sec, QRS: .08 sec, QT: .44 sec
2.
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| 1st degree block with trigeminal PVCs |
The rhythm is irregular because of the PVCs. The rate is 80/min. There are wide upright P waves before each sinus beat. The PR interval is prolonged. There are unifocal PVCs that occur every 3rd beat. This is followed by a compensatory pause. PR: .24 sec, QRS: .12 sec, QT: 48 sec.
3.
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| Normal sinus rhythm with a fusion PVC |
The rhythm is regular except for the PVC. The calculated rate is 78/min. The P waves are upright and precede the QRS complexes. There is a single fusion beat PVC present. Notice the small P wave that precedes the PVC. A sinus beat and a ventricular beat are initiated at nearly the same time. PR: .20 sec, QRS; .08 sec QT: .44 sec.
4.
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| Sinus arrhythmia |
The rhythm is irregular. The R-R interval between the 1st and 2nd complex is .60 sec and the R-R interval between the 9th and 10th complex is 1 sec. The P waves are upright and precede each QRS complex. The P waves of the 10th-13th complexes are smaller than the earlier complexes. No ectopic beats are noted. PR: .20 sec. QRS: .08 sec, QT: .32 sec.
5.
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| Sinus tachycardia |
The rhythm is regular. The rate is 166/min. Upright, uniform P waves precede the QRS complexes. No ectopy is noted. PR: .12 sec, QRS: .08 sec, QT: .24 sec
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