Practice EKG Rhythm Strips 187
Identify the following rhythms.
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Answers
1.
The rhythm is regular with a rate of 88/min. There are both upright and negative P waves present. The P waves of the first four complexes are upright but beginning at the fifth complex the P waves are retrograde. No ectopic beats are present. PR: .12 sec, QRS: .08 sec, QT: . 36 sec.
2.
The rhythm is irregular. The rate is 120/min. Upright P waves are seen on the first 4 beats. The 1st and 3rd beats are sinus beats while the 2nd and 4th beats look like PACs. This is followed by a 7 beat run of ventricular tachycardia. PR: .12 sec, QRS: .08 sec, QT: .36 sec.
3.
The rhythm is irregular with frequent PACs. The rate is 100/min. There are upright P waves present. The P waves are associated with a QRS complex. There are PACs every other beat in a bigeminal pattern. The morphology of the P waves of the PACs differs from the morphology of the sinus P waves. PR: .12 sec, QRS: .08 sec, QT: .36 sec.
4.
The rhythm is irregular with a rate of 90/min. The P waves are positive and have a corresponding QRS complex. There are bigeminal unifocal PVCs present. A compensatory pause follows each PVC. PR: .16 sec, QRS: .08 sec, QT: .40 sec.
5.
The rhythm is slightly irregular with a rate of 58/min. The P waves are upright and associated with a QRS complex. No ectopic beats are present. PR: .22 sec, QRS: .08 sec, QT: .36 sec.
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2.
3.
4.
5.
Answers
1.
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| Normal sinus rhythm changing to accelerated junctional rhythm |
The rhythm is regular with a rate of 88/min. There are both upright and negative P waves present. The P waves of the first four complexes are upright but beginning at the fifth complex the P waves are retrograde. No ectopic beats are present. PR: .12 sec, QRS: .08 sec, QT: . 36 sec.
2.
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| Seven beat run of ventricular tachycardia |
The rhythm is irregular. The rate is 120/min. Upright P waves are seen on the first 4 beats. The 1st and 3rd beats are sinus beats while the 2nd and 4th beats look like PACs. This is followed by a 7 beat run of ventricular tachycardia. PR: .12 sec, QRS: .08 sec, QT: .36 sec.
3.
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| Bigeminal PACs |
The rhythm is irregular with frequent PACs. The rate is 100/min. There are upright P waves present. The P waves are associated with a QRS complex. There are PACs every other beat in a bigeminal pattern. The morphology of the P waves of the PACs differs from the morphology of the sinus P waves. PR: .12 sec, QRS: .08 sec, QT: .36 sec.
4.
The rhythm is irregular with a rate of 90/min. The P waves are positive and have a corresponding QRS complex. There are bigeminal unifocal PVCs present. A compensatory pause follows each PVC. PR: .16 sec, QRS: .08 sec, QT: .40 sec.
5.
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| Sinus arrhythmia with 1st degree block |
The rhythm is slightly irregular with a rate of 58/min. The P waves are upright and associated with a QRS complex. No ectopic beats are present. PR: .22 sec, QRS: .08 sec, QT: .36 sec.
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