Practice EKG Rhythm Strips 234
Identify the following rhythms.
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Answers
1.
The rhythm is irregular. The rate is 110/min. The P waves are upright and associated with a QRS complex. But after the 4th complex the rhythm changes to a narrow complex tachycardia and the P waves are no longer seen. The QRS complex remains narrow throughout the strip. No ectopic beats are seen. PR: .16 sec, QRS: .08 sec, QT: .36 sec. Interpretation: Normal sinus rhythm changing to SVT
2.
The rhythm is irregular. The rate is 90/min. There are upright P waves which are associated with a QRS complex. The QRS complex is narrow. There are PACs seen, the 2nd, 4th, 6th, and 9th complex. The P waves of the PACs are merged with the T wave of the preceding complexes. PR: .20 sec, QRS: .08 sec, QT: .36 sec. Interpretation: Normal sinus rhythm with PACs
3.
The rhythm is irregular with a rate of 80/min. The P waves have a corresponding QRS complex. There are unifocal PVCs present every 5th beat, pentageminy. PR: .12 sec, QRS: .08 sec. QT: .36 sec. Interpretation: Normal sinus rhythm with unifocal PVCs.
4.
The rhythm is irregular and the heart rate is 100/min. There are upright P waves present. Each P wave is associated with a QRS complex. The PR interval is prolonged. The QRS complexes are narrow. The 2nd, 4th, and 8th complexes are PACs. PR: .28 sec, QRS: .08 sec, QT: .32 sec. Interpretation: 1st degree block with PACs
5.
The rhythm is irregular. The rate is 90/min. The P waves are associated with a QRS complex. There are two PJCs present, the 5th and 7th complexes. Notice the inverted P waves associated with the PJCs. There are also two unifocal PVCs present. Ventricular pacer spikes are also seen. PR: .12 sec, QRS: .16 sec, QT: . 36 sec. Interpretation: Ventricular paced with PJCs and PVCs
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2.
3.
4.
5.
Answers
1.
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| Normal sinus rhythm changing to SVT |
The rhythm is irregular. The rate is 110/min. The P waves are upright and associated with a QRS complex. But after the 4th complex the rhythm changes to a narrow complex tachycardia and the P waves are no longer seen. The QRS complex remains narrow throughout the strip. No ectopic beats are seen. PR: .16 sec, QRS: .08 sec, QT: .36 sec. Interpretation: Normal sinus rhythm changing to SVT
2.
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| Normal sinus rhythm with PACs |
The rhythm is irregular. The rate is 90/min. There are upright P waves which are associated with a QRS complex. The QRS complex is narrow. There are PACs seen, the 2nd, 4th, 6th, and 9th complex. The P waves of the PACs are merged with the T wave of the preceding complexes. PR: .20 sec, QRS: .08 sec, QT: .36 sec. Interpretation: Normal sinus rhythm with PACs
3.
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| Normal sinus rhythm with unifocal PVCs. |
The rhythm is irregular with a rate of 80/min. The P waves have a corresponding QRS complex. There are unifocal PVCs present every 5th beat, pentageminy. PR: .12 sec, QRS: .08 sec. QT: .36 sec. Interpretation: Normal sinus rhythm with unifocal PVCs.
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| 1st degree block with PACs |
The rhythm is irregular and the heart rate is 100/min. There are upright P waves present. Each P wave is associated with a QRS complex. The PR interval is prolonged. The QRS complexes are narrow. The 2nd, 4th, and 8th complexes are PACs. PR: .28 sec, QRS: .08 sec, QT: .32 sec. Interpretation: 1st degree block with PACs
5.
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| Ventricular paced with PJCs and PVCs |
The rhythm is irregular. The rate is 90/min. The P waves are associated with a QRS complex. There are two PJCs present, the 5th and 7th complexes. Notice the inverted P waves associated with the PJCs. There are also two unifocal PVCs present. Ventricular pacer spikes are also seen. PR: .12 sec, QRS: .16 sec, QT: . 36 sec. Interpretation: Ventricular paced with PJCs and PVCs
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