Practice ECG Rhythm Strips 131
Identify the following rhythms.
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Answers
1.
The rhythm is regular. The ventricular rate is 33/min and the atrial rate is 107. There are upright P waves and the P waves do not correspond to the QRS complexes. The QRS complex has an RSR pattern in V1 which is consistent with a RBBB. There are extra non-conducted P waves. PR: --, QRS: .12 sec, QT: .60 sec.
2.
The rhythm is regular. The calculated rate is 65/min. No P waves are noted in the first two complexes but there are some small retrograde P waves that follow the QRS complexes in the 3rd-7th complexes. No ectopic beats are present. PR: ---, QRS: .12 sec QT: .44 sec.
3.
The rhythm is irregular. The rate is 60/min. There are no P waves only fibrillatory waves between the complexes. No ectopic beats are noted. PR: ---, QRS: .08 sec, QT: .44 sec
4.
The rhythm is regular. The rate is 100/min. There are upright P waves present on the sinus beats. Bigeminal unifocal PVCs are present. PR: .12 sec, QRS: .12 sec, QT: .40 sec
5.
The rhythm is regular. The rate is 166. There are small upright P wave present before each QRS complex. No ectopic beats are noted. PR: .08 sec, QRS: .12 sec, QT: .28 sec
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2.
3.
4.
5.
Answers
1.
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| Complete heart block |
The rhythm is regular. The ventricular rate is 33/min and the atrial rate is 107. There are upright P waves and the P waves do not correspond to the QRS complexes. The QRS complex has an RSR pattern in V1 which is consistent with a RBBB. There are extra non-conducted P waves. PR: --, QRS: .12 sec, QT: .60 sec.
2.
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| Accelerated junctional rhythm |
The rhythm is regular. The calculated rate is 65/min. No P waves are noted in the first two complexes but there are some small retrograde P waves that follow the QRS complexes in the 3rd-7th complexes. No ectopic beats are present. PR: ---, QRS: .12 sec QT: .44 sec.
3.
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| Atrial fibrillation |
The rhythm is irregular. The rate is 60/min. There are no P waves only fibrillatory waves between the complexes. No ectopic beats are noted. PR: ---, QRS: .08 sec, QT: .44 sec
4.
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| Bigeminy |
The rhythm is regular. The rate is 100/min. There are upright P waves present on the sinus beats. Bigeminal unifocal PVCs are present. PR: .12 sec, QRS: .12 sec, QT: .40 sec
5.
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| Sinus tachycardia |
The rhythm is regular. The rate is 166. There are small upright P wave present before each QRS complex. No ectopic beats are noted. PR: .08 sec, QRS: .12 sec, QT: .28 sec
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