Practice EKG Rhythm Strips 107
Identify the following rhythms.
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5
Answers
1.
The rhythm is regular with a rate of 75/min. There are upright P waves before each QRS complex. Each P wave is pacemaker induced. No ectopic beats are noted. The QRS complex is also preceded by a pacer spike. PR: .20 sec, QRS: .16 sec, QT: .48 sec.
2.
The rhythm is irregular. The rate is 108/min. The P waves are absent. There are flutter or fibrillatory waves between the QRS complexes. Three unifocal PVCs are present. PR: ---, QRS: .12 sec, QT .32 sec.
3.
The rhythm is irregular due to a PAC and the rate is 66/min. The P waves are upright and precede the QRS complexes. The 7th complex arrives early in the cardiac cycle and has a P wave that differs in morphology and PR interval than the sinus P waves. The P waves that follow the PAC also have higher voltage P waves than the previous P waves. It does not look like an atrial ectopic focus has taken over. May only represent just improved skin to electrode contact on the patient. The PR interval is unchanged. PR: .16 sec, QRS: .08 sec, QT: .40 sec.
4.
The rhythm is irregular due to the ectopy. The rate is 84/min No P waves can be seen. Some multifocal PVCs are present. There are ventricular pacemaker spikes present. PR: ---, QRS: .16 sec, QT: .48 sec.
5.
The rhythm is regular with a ventricular rate of 57/min. P waves are present, upright, and precede the QRS complexes. No ectopic beats are noted. PR: .12,sec, QRS: .08 sec, QT: .48 sec.
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2.
3.
4.
5
Answers
1.
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| AV paced |
The rhythm is regular with a rate of 75/min. There are upright P waves before each QRS complex. Each P wave is pacemaker induced. No ectopic beats are noted. The QRS complex is also preceded by a pacer spike. PR: .20 sec, QRS: .16 sec, QT: .48 sec.
2.
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| Atrial fibrillation with unifocal PVCs |
The rhythm is irregular. The rate is 108/min. The P waves are absent. There are flutter or fibrillatory waves between the QRS complexes. Three unifocal PVCs are present. PR: ---, QRS: .12 sec, QT .32 sec.
3.
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| Normal sinus rhythm with a PAC |
The rhythm is irregular due to a PAC and the rate is 66/min. The P waves are upright and precede the QRS complexes. The 7th complex arrives early in the cardiac cycle and has a P wave that differs in morphology and PR interval than the sinus P waves. The P waves that follow the PAC also have higher voltage P waves than the previous P waves. It does not look like an atrial ectopic focus has taken over. May only represent just improved skin to electrode contact on the patient. The PR interval is unchanged. PR: .16 sec, QRS: .08 sec, QT: .40 sec.
4.
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| Ventricular paced with unifocal PVCs |
The rhythm is irregular due to the ectopy. The rate is 84/min No P waves can be seen. Some multifocal PVCs are present. There are ventricular pacemaker spikes present. PR: ---, QRS: .16 sec, QT: .48 sec.
5.
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| Sinus bradycardia |
The rhythm is regular with a ventricular rate of 57/min. P waves are present, upright, and precede the QRS complexes. No ectopic beats are noted. PR: .12,sec, QRS: .08 sec, QT: .48 sec.
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