EKG Rhythm Strips 59
Identify the following rhythms.
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Answers
1.
The rhythm is irregular with a rate of 70/min. The P waves are upright, uniform, and associated with a QRS complex. There are premature atrial contractions every other beat. The P wave of the PAC is hidden in the T wave of the preceding complex. PR: .20 sec, QRS: .10 sec, QT: .42 sec.
2.
The rhythm is irregular with a rate of 70/min. There are negative P waves present before each QRS complex. There are pacemaker spikes that occur randomly. No ectopic beats are noted. PR: .12 sec, QRS: .08 sec, QT: .36 sec.
3.
The rhythm is regular. The ventricular rate is 58/min. The P waves are absent. The QRS complex is narrow. No ectopic beats are noted. 1 mm ST elevation is seen in lead II. PR; ---, QRS: .08 sec, QT: .40 sec.
4.
The rhythm is regular with a rate of 150/min. The P waves are upright and associated with a QRS complex. No ectopic beats are noted. PR: .10 sec, QRS: .08 sec, QT: .24 sec.
5.
The rhythm is irregular with frequent PACs. The P waves are upright and precede a QRS complex. There are at least 3 P waves of varying morphology, a characteristic of wandering atrial pacemaker. PR: .12 sec/.16 sec. QRS: .08 sec. QT: .36 sec.
Reviewed 3/2/16
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2.
3.
4.
5.
Answers
1.
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| Atrial bigeminy |
The rhythm is irregular with a rate of 70/min. The P waves are upright, uniform, and associated with a QRS complex. There are premature atrial contractions every other beat. The P wave of the PAC is hidden in the T wave of the preceding complex. PR: .20 sec, QRS: .10 sec, QT: .42 sec.
2.
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| Failure to sense |
The rhythm is irregular with a rate of 70/min. There are negative P waves present before each QRS complex. There are pacemaker spikes that occur randomly. No ectopic beats are noted. PR: .12 sec, QRS: .08 sec, QT: .36 sec.
3.
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| Junctional rhythm |
The rhythm is regular. The ventricular rate is 58/min. The P waves are absent. The QRS complex is narrow. No ectopic beats are noted. 1 mm ST elevation is seen in lead II. PR; ---, QRS: .08 sec, QT: .40 sec.
4.
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| Sinus tachycardia |
The rhythm is regular with a rate of 150/min. The P waves are upright and associated with a QRS complex. No ectopic beats are noted. PR: .10 sec, QRS: .08 sec, QT: .24 sec.
5.
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| Wandering atrial pacemaker |
The rhythm is irregular with frequent PACs. The P waves are upright and precede a QRS complex. There are at least 3 P waves of varying morphology, a characteristic of wandering atrial pacemaker. PR: .12 sec/.16 sec. QRS: .08 sec. QT: .36 sec.
Reviewed 3/2/16
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