Practice EKG Rhythm Strips 162
Identify the following rhythms.
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Answers
1.
This paced rhythm is regular with a rate of 60/min. There are upright P waves before each QRS complexes. Each P wave is preceded by a pacer spike. No ectopic beats are noted. PR: .20 sec, QRS: .08 sec, QT .48 seconds.
2.
The rhythm is regular and the rate is 88/min. The P waves are associated with the QRS complexes and are uniform and upright. No ectopic beats are seen. In lead II there is 2mm ST elevation with some inversion of the T wave. PR: .16 sec, QRS: .08 sec, QT: .40 sec.
3.
This rhythm is irregular due to the PAC. The rate is 80/min. The P waves are upright and precede the QRS complex. The 3rd complex is a PAC. Notice the change in the height of the preceding T wave. The change in height is the result of the additional voltage from the P wave. This is followed by a pause as the SA node and rhythm is reset. PR: .12 sec, QRS: .10 sec, QT: .40 sec.
4.
This rhythm is irregular because of the various ectopy present. The rate is 110/min. The P waves are associated with a QRS complex and are upright The 8th complex is a PAC. You can just see the P wave on the latter part of the preceding T wave. The 6th complexes is a PVCs and is followed by a brief compensatory pause The 3rd complex may either be an interpolated PVC or an aberrantly conducted PAC. Notice that there is a change in the characteristic of the T wave of the 2nd complex. This may represent a hidden P wave. You would need to look at the rhythm in other leads to be sure. PR: 12 sec, QRS: .08 sec, QT: .36 sec.
5.
The rhythm is irregular because of the PVCs. The rate is 80/min. P waves are present, upright, and are associated with QRS complexes. There are unifocal PVCs every 3rd beat. A compensatory pause follows each PVC. PR: .16 sec, QRS: .08 sec, QT: .36 sec.
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Answers
1.
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| Atrial paced |
This paced rhythm is regular with a rate of 60/min. There are upright P waves before each QRS complexes. Each P wave is preceded by a pacer spike. No ectopic beats are noted. PR: .20 sec, QRS: .08 sec, QT .48 seconds.
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| Normal sinus rhythm with ST elevation in lead II |
The rhythm is regular and the rate is 88/min. The P waves are associated with the QRS complexes and are uniform and upright. No ectopic beats are seen. In lead II there is 2mm ST elevation with some inversion of the T wave. PR: .16 sec, QRS: .08 sec, QT: .40 sec.
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| Normal sinus rhythm with a PAC |
This rhythm is irregular due to the PAC. The rate is 80/min. The P waves are upright and precede the QRS complex. The 3rd complex is a PAC. Notice the change in the height of the preceding T wave. The change in height is the result of the additional voltage from the P wave. This is followed by a pause as the SA node and rhythm is reset. PR: .12 sec, QRS: .10 sec, QT: .40 sec.
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| Sinus tachycardia with multifocal PVCs and a PAC |
This rhythm is irregular because of the various ectopy present. The rate is 110/min. The P waves are associated with a QRS complex and are upright The 8th complex is a PAC. You can just see the P wave on the latter part of the preceding T wave. The 6th complexes is a PVCs and is followed by a brief compensatory pause The 3rd complex may either be an interpolated PVC or an aberrantly conducted PAC. Notice that there is a change in the characteristic of the T wave of the 2nd complex. This may represent a hidden P wave. You would need to look at the rhythm in other leads to be sure. PR: 12 sec, QRS: .08 sec, QT: .36 sec.
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| Trigeminy |
The rhythm is irregular because of the PVCs. The rate is 80/min. P waves are present, upright, and are associated with QRS complexes. There are unifocal PVCs every 3rd beat. A compensatory pause follows each PVC. PR: .16 sec, QRS: .08 sec, QT: .36 sec.
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