Practice ECG Rhythm Strips 94
Identify the following rhythms.
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Answers
1.
The rhythm is regular with a rate of 68/min. The P waves are upright and are associated with a QRS complex. The PR interval is prolonged. No ectopic beats are noted. PR: .28 sec, QRS: .08 sec, QT: .36 sec.
2.
The rhythm is irregular. The rate is 50/min. There are upright P waves present. The 3rd and 7th P wave do not have a corresponding QRS complex. There is progressive lengthening of the PR interval followed by a dropped beat. PR: ---, QRS: .08 sec, QT: .44 sec.
3.
The rhythm is irregular. The calculated underlying rate is 100/min. The P waves are positive have a corresponding QRS complex. A single PVC begins the rhythm strip and it is closely followed by a 7 beat run of ventricular tachycardia. It appears that the ventricular tachycardia begins on the 2nd half of the T wave. PR: .12 sec, QRS: .08 sec, QT: .44 sec.
4.
The rhythm is regular with a rate of 136/min. There are only two P waves seen in this strip, the 2nd and 11th complexes. The QRS complexes are narrow. No ectopy is noted. The rhythm at the bottom of the strip is an arterial blood pressure tracing. Overall the strip shows junctional tachycardia. PR: ---, QRS: .06, QT: .28 sec.
5.
The rhythm is regular with a rate of 54/min. The P waves are upright and precede the QRS complexes. No ectopic beats are present. The ST segment is horizontally depressed with inversion of the T wave. PR; .12 sec, QRS: .08 sec, QT: .40 sec.
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2.
3.
4.
5.
Answers
1.
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| 1st degree block |
The rhythm is regular with a rate of 68/min. The P waves are upright and are associated with a QRS complex. The PR interval is prolonged. No ectopic beats are noted. PR: .28 sec, QRS: .08 sec, QT: .36 sec.
2.
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| 2nd degree AV block type I (Mobitz I) |
The rhythm is irregular. The rate is 50/min. There are upright P waves present. The 3rd and 7th P wave do not have a corresponding QRS complex. There is progressive lengthening of the PR interval followed by a dropped beat. PR: ---, QRS: .08 sec, QT: .44 sec.
3.
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| NSR with R-on-T run of ventricular tachycardia |
The rhythm is irregular. The calculated underlying rate is 100/min. The P waves are positive have a corresponding QRS complex. A single PVC begins the rhythm strip and it is closely followed by a 7 beat run of ventricular tachycardia. It appears that the ventricular tachycardia begins on the 2nd half of the T wave. PR: .12 sec, QRS: .08 sec, QT: .44 sec.
4.
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| Junctional tachycardia |
The rhythm is regular with a rate of 136/min. There are only two P waves seen in this strip, the 2nd and 11th complexes. The QRS complexes are narrow. No ectopy is noted. The rhythm at the bottom of the strip is an arterial blood pressure tracing. Overall the strip shows junctional tachycardia. PR: ---, QRS: .06, QT: .28 sec.
5.
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| Sinus bradycardia |
The rhythm is regular with a rate of 54/min. The P waves are upright and precede the QRS complexes. No ectopic beats are present. The ST segment is horizontally depressed with inversion of the T wave. PR; .12 sec, QRS: .08 sec, QT: .40 sec.
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