Practice EKG Rhythm Strips 208
Identify the following rhythms.
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Answers
1.
The rhythm is regular with a ventricular rate of 36/min and an atrial rate of 83/min. There is complete AV dissociation so the P waves do not have a corresponding QRS complex. The P waves are uniform and upright suggesting a sinus origin. The QRS complex is wide suggesting a ventricular escape mechanism that is stimulating the ventricles. PR: ---, QRS: .12 sec, QT: .52 sec.
2.
The rhythm is regular with a heart rate of 150/min. The P waves are not readily seen. The QRS complex is narrow which is indicative of a supraventricular rhythm. The rhythm has a saw tooth appearance which resembles atrial flutter but until the rate is slowed down we can not be sure. Vagal maneuvers may provide some clues No ectopic beats are seen. PR: ---, QRS: .08 sec, QT: .28 sec.
3.
The rhythm is irregular with a rate of 100/min. The P waves are uniform, positive, and precede the QRS complexes. There are ventricular pacer spikes seen on some of the complexes. There are aberrantly conducted sinus beats seen every third beat. A P wave precedes the QRS complex with these beats so this indicates that they are probably not PVCs. PR: .20 sec, QRS: .16 sec, QT: .44 sec
4.
The rhythm is slightly irregular with a ventricular rate of 188/min. No P waves are seen. The QRS is wide which is characteristic of a ventricular rhythm. PR: ---, QRS: .16 sec, QT: ---
5.
The rhythm is irregular with a rate of 110/min. The P waves are upright and are paired with a QRS complex. There are some PACs present; 2nd, 5th, and 11th complexes. The P wave and PR interval of the PACs differs from the sinus P waves. PR: .16 sec, QRS: .08 sec, QT: .44 sec.
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2.
3.
4.
5.
Answers
1.
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| Compete heart block |
The rhythm is regular with a ventricular rate of 36/min and an atrial rate of 83/min. There is complete AV dissociation so the P waves do not have a corresponding QRS complex. The P waves are uniform and upright suggesting a sinus origin. The QRS complex is wide suggesting a ventricular escape mechanism that is stimulating the ventricles. PR: ---, QRS: .12 sec, QT: .52 sec.
2.
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| Supraventricular tachycardia |
The rhythm is regular with a heart rate of 150/min. The P waves are not readily seen. The QRS complex is narrow which is indicative of a supraventricular rhythm. The rhythm has a saw tooth appearance which resembles atrial flutter but until the rate is slowed down we can not be sure. Vagal maneuvers may provide some clues No ectopic beats are seen. PR: ---, QRS: .08 sec, QT: .28 sec.
3.
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| Demand ventricular pacing |
The rhythm is irregular with a rate of 100/min. The P waves are uniform, positive, and precede the QRS complexes. There are ventricular pacer spikes seen on some of the complexes. There are aberrantly conducted sinus beats seen every third beat. A P wave precedes the QRS complex with these beats so this indicates that they are probably not PVCs. PR: .20 sec, QRS: .16 sec, QT: .44 sec
4.
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| Ventricular tachycardia |
The rhythm is slightly irregular with a ventricular rate of 188/min. No P waves are seen. The QRS is wide which is characteristic of a ventricular rhythm. PR: ---, QRS: .16 sec, QT: ---
5.
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| Sinus tachycardia with PACs |
The rhythm is irregular with a rate of 110/min. The P waves are upright and are paired with a QRS complex. There are some PACs present; 2nd, 5th, and 11th complexes. The P wave and PR interval of the PACs differs from the sinus P waves. PR: .16 sec, QRS: .08 sec, QT: .44 sec.
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