Practice EKG Rhythm Strips 209
Identify the following rhythms.
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Answers
1.
The rhythm is irregular with a rate of 60/minute. Multiple P waves or flutter waves are present in a 3:1 and 4:1 ratio. No ectopic beats are seen. PR:---, QRS: .08 sec, QT: .24 sec. Interpretation: Atrial flutter with variable ventricular response
2.
The rhythm is regular with a rate of 38/min. There are some small upright P waves seen but they are associated with the QRS complexes. The atrial rate is 60/min. No ectopic beats are seen. PR: ---, QRS: .16 sec, QT: .44 sec. Interpretation: Complete heart block
3.
The rhythm is regular with a heart rate of 100/min. The P waves are uniform, upright, and associated with a QRS complex. No ectopic beats are seen. PR: .12 sec, QRS: .08 sec, QT: .32 sec. Interpretation: Normal sinus rhythm
4.
The rhythm is irregular with a rate of 60/min. The P waves are upright. There are two nonconducted P waves that follow the 3rd and 6th complexes. They are fused with the T wave of the preceding complex (seen better in the V1 lead). A pause follows the dropped P waves. PR: .12 sec, QRS: .08 sec, QT: 32 sec. Interpretation: Normal sinus rhythm with dropped PACs
5.
The rhythm is regular with a rate of 188/min. There are a few P waves seen on some of the complexes: 3, 11, 15, 16, 18, and 21. The morphology of theses P waves is different which suggests either a multifocal atrial tachycardia or atrial fibrillation. Because the rate is so fast the rhythm appears more regular. Vagal maneuvers may help clarify the rhythm. The QRS complex is narrow. PR: ---, QRS: .08 sec, QT: .20 sec. Interpretation: Supraventricular tachycardia.
1.
2.
3.
4.
5.
Answers
1.
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| Atrial flutter with variable ventricular response |
The rhythm is irregular with a rate of 60/minute. Multiple P waves or flutter waves are present in a 3:1 and 4:1 ratio. No ectopic beats are seen. PR:---, QRS: .08 sec, QT: .24 sec. Interpretation: Atrial flutter with variable ventricular response
2.
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| Complete heart block |
The rhythm is regular with a rate of 38/min. There are some small upright P waves seen but they are associated with the QRS complexes. The atrial rate is 60/min. No ectopic beats are seen. PR: ---, QRS: .16 sec, QT: .44 sec. Interpretation: Complete heart block
3.
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| Normal sinus rhythm |
The rhythm is regular with a heart rate of 100/min. The P waves are uniform, upright, and associated with a QRS complex. No ectopic beats are seen. PR: .12 sec, QRS: .08 sec, QT: .32 sec. Interpretation: Normal sinus rhythm
4.
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| Normal sinus rhythm with dropped PACs |
The rhythm is irregular with a rate of 60/min. The P waves are upright. There are two nonconducted P waves that follow the 3rd and 6th complexes. They are fused with the T wave of the preceding complex (seen better in the V1 lead). A pause follows the dropped P waves. PR: .12 sec, QRS: .08 sec, QT: 32 sec. Interpretation: Normal sinus rhythm with dropped PACs
5.
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| Supraventricular tachycardia |
The rhythm is regular with a rate of 188/min. There are a few P waves seen on some of the complexes: 3, 11, 15, 16, 18, and 21. The morphology of theses P waves is different which suggests either a multifocal atrial tachycardia or atrial fibrillation. Because the rate is so fast the rhythm appears more regular. Vagal maneuvers may help clarify the rhythm. The QRS complex is narrow. PR: ---, QRS: .08 sec, QT: .20 sec. Interpretation: Supraventricular tachycardia.
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