Practice EKG Rhythm Strips 216
Identify the following rhythms.
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Answers
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The rhythm is regular. The rate is 75/min. There are upright P waves before each QRS complex. Lead II shows 3mm ST segment depression with an inverted T wave. No ectopic beats are seen. PR: .16 sec, QRS: .08 sec, QT: .36 sec. Interpretation: Normal sinus rhythm
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This strip shows an arterial blood pressure waveform in the 2nd lead. The rhythm is irregular.
The P waves are upright and are associated with a QRS complex. The P waves are wide suggesting left atrial enlargement. There are multifocal PVCs present. A multifocal couplet follows the 4th complex. PR: .18 sec, QRS: .12 sec, QT: .28 sec. Interpretation: Normal sinus rhythm with a multifocal couplet. Notice the drop in the arterial blood pressure following the couplet.
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The rhythm is irregular with a rate of 50/min. There are upright P waves before each QRS. The P wave of the 2nd complex has a different shape than the other P waves which indicates that it not a sinus P wave. The early beat of the 2nd complex is a PAC. The QRS complexes are narrow. PR: .16 sec, QRS: .08 sec, QT: .48 sec. Interpretation: Sinus bradycardia, sinus arrhythmia with a PAC
5.
The rhythm is regular with a rate of 150/min. No P waves are seen. The QRS complex is wide suggesting a ventricular rhythm. No ectopic beats are seen. PR: ---, QRS: .16 sec, QT: .36 sec. Interpretation: Ventricular tachycardia
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Answers
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| Complete heart block |
The rhythm is regular with a ventricular rate of 38/min. There are small upright P waves present but they are not associated with a QRS complex. The QRS complexes are wide suggesting a ventricular origin. No ectopic beats are seen. PR: ---, QRS: .16 sec, QT: .40 sec. Interpretation: Complete heart block
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| Normal sinus rhythm |
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| Normal sinus rhythm with a multifocal couplet |
The P waves are upright and are associated with a QRS complex. The P waves are wide suggesting left atrial enlargement. There are multifocal PVCs present. A multifocal couplet follows the 4th complex. PR: .18 sec, QRS: .12 sec, QT: .28 sec. Interpretation: Normal sinus rhythm with a multifocal couplet. Notice the drop in the arterial blood pressure following the couplet.
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| Sinus bradycardia, sinus arrhythmia with a PAC |
The rhythm is irregular with a rate of 50/min. There are upright P waves before each QRS. The P wave of the 2nd complex has a different shape than the other P waves which indicates that it not a sinus P wave. The early beat of the 2nd complex is a PAC. The QRS complexes are narrow. PR: .16 sec, QRS: .08 sec, QT: .48 sec. Interpretation: Sinus bradycardia, sinus arrhythmia with a PAC
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| Ventricular tachycardia |
The rhythm is regular with a rate of 150/min. No P waves are seen. The QRS complex is wide suggesting a ventricular rhythm. No ectopic beats are seen. PR: ---, QRS: .16 sec, QT: .36 sec. Interpretation: Ventricular tachycardia
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