Practice EKG Rhythm Strips 215
Identify the following rhythms.
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Answers
1.
The rhythm is irregular with a rate of 60/min. There are upright P waves present. There is progressive elongation of the PR interval over successive beats. A non-conducted P wave follows the 4th complex. No ectopic beats are present. The QRS complex is narrow. PR: .28/.32/.36 sec. QRS: .08 sec, QT: .44 sec. Interpretation: 2nd degree AV block type I
2.
The rhythm is regular with a rate of 75/min. There are small upright P waves that follow the atrial pacer spike. No ectopic beats are seen. PR: .28 sec. QRS: .08 sec, QT: .34 sec. Interpretation: Atrial paced rhythm
3.
The rhythm is irregular. The rate is 70/min. The P waves are uniform, positive, and have a corresponding QRS complex. A pause follows the 3rd complex. The 4th complex is a junctional escape beat. It is narrow and lacks a P wave. The remains complexes are sinus in origin. PR: .12 sec, QRS: .08 sec, QT: .40 sec. Interpretation: NSR with a pause and a junctional escape beat
4.
The rhythm is irregular with a rate of 70/min. There are P waves associated with the QRS complexes. There are premature atrial contractions every other beat, atrial bigeminy. The P waves of the ectopic beats is small than the corresponding P waves of sinus origin. The last PAC, complex 7, has a P wave that appears buried within the T wave of the precious complex. All the QRS complex have a similar morphology which also confirms that the ectopy are PACs and not PVCs. PR: .12 sec, QRS: .12 sec, QT: .40 sec. Interpretation: Normal sinus rhythm with bigeminal PACs
5.
The rhythm is regular with a heart rate of 214/min. There are not any P waves seen. The QRS complex is narrow, suggesting a supraventricular origin. No ectopic beats are seen. PR: ---, QRS: .08 sec, QT: .20 sec. Interpretation: Supraventricular tachycardia
1.
2.
3.
4.
5.
Answers
1.
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| 2nd degree AV block type I |
The rhythm is irregular with a rate of 60/min. There are upright P waves present. There is progressive elongation of the PR interval over successive beats. A non-conducted P wave follows the 4th complex. No ectopic beats are present. The QRS complex is narrow. PR: .28/.32/.36 sec. QRS: .08 sec, QT: .44 sec. Interpretation: 2nd degree AV block type I
2.
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| Atrial paced rhythm |
3.
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| NSR with a pause followed by a junctional escape beat |
4.
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| Normal sinus rhythm with bigeminal PACs |
5.
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| Supraventricular tachycardia |
The rhythm is regular with a heart rate of 214/min. There are not any P waves seen. The QRS complex is narrow, suggesting a supraventricular origin. No ectopic beats are seen. PR: ---, QRS: .08 sec, QT: .20 sec. Interpretation: Supraventricular tachycardia
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