Practice EKG Rhythm Strips 183
Identify the following rhythms.
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Answers
1.
The rhythm is regular with a rate of 38/min. The P waves are upright and uniform. There is no association between the P waves and the QRS complexes. A P wave is buried in the ST segment of the 2nd complex. No ectopic beats are seen. The QRS complex is wide suggesting an ventricular escape rhythm. PR: ---, QRS: .16 sec, QT: .52 sec.
2.
The rhythm is irregular with a rate of 70/min. The initial 3 complexes have negative P waves and the remaining 4 complexes have upright P waves. There is slight pause after the 3rd complex in which the rhythm transitions from a junctional rhythm to a sinus rhythm. All the P waves have a corresponding QRS complex. No ectopic beats are seen. PR: 12 sec, QRS: .08 sec. QT: .52 sec
3.
The rhythm is regular with a rate of 125/min. No P waves are seen. No ectopic beats are present. The QRS complex has an RSr configuration. There is 2mm ST segment depression with an inverted T wave. PR: ---, QRS: .10 sec, QT: .36 sec.
4.
The rhythm is irregular with multiple PVCs. The heart rate is 80/min. The P waves are not seen. There are two unifocal couplets present. The QRS complexes are preceded by a ventricular pacer spike. PR: ---, QRS: .12 sec, QT: .44 sec.
5.
The rhythm is irregular with a ventricular rate of 100/min. The are tall, wide, and uniform P waves before each QRS complexes. Unifocal PVCs are seen every fourth beat. PR: .18 sec, QRS: .08 sec, QT: . 40 sec.
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2.
3.
4.
5.
Answers
1.
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| Complete heart block |
The rhythm is regular with a rate of 38/min. The P waves are upright and uniform. There is no association between the P waves and the QRS complexes. A P wave is buried in the ST segment of the 2nd complex. No ectopic beats are seen. The QRS complex is wide suggesting an ventricular escape rhythm. PR: ---, QRS: .16 sec, QT: .52 sec.
2.
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| Junctional rhythm changing to a sinus rhythm |
The rhythm is irregular with a rate of 70/min. The initial 3 complexes have negative P waves and the remaining 4 complexes have upright P waves. There is slight pause after the 3rd complex in which the rhythm transitions from a junctional rhythm to a sinus rhythm. All the P waves have a corresponding QRS complex. No ectopic beats are seen. PR: 12 sec, QRS: .08 sec. QT: .52 sec
3.
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| Junctional tachycardia |
The rhythm is regular with a rate of 125/min. No P waves are seen. No ectopic beats are present. The QRS complex has an RSr configuration. There is 2mm ST segment depression with an inverted T wave. PR: ---, QRS: .10 sec, QT: .36 sec.
4.
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| Ventricular paced rhythm with a pair of unifocal couplets |
The rhythm is irregular with multiple PVCs. The heart rate is 80/min. The P waves are not seen. There are two unifocal couplets present. The QRS complexes are preceded by a ventricular pacer spike. PR: ---, QRS: .12 sec, QT: .44 sec.
5.
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| Normal sinus rhythm with unifocal PCVs |
The rhythm is irregular with a ventricular rate of 100/min. The are tall, wide, and uniform P waves before each QRS complexes. Unifocal PVCs are seen every fourth beat. PR: .18 sec, QRS: .08 sec, QT: . 40 sec.
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