Practice EKG Rhythm Strips 222
Identify the following rhythms.
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Answers
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The rhythm is regular. The ventricular rate is 30/min. There are upright P waves present but not all of them are associated with a QRS complex. A nonconducted P wave follows each QRS complex. The QRS is wide. The T wave is inverted in lead II. PR: .36 sec, QRS: .12 sec, QT: .52 sec. Interpretation: 2nd degree heart block type II
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The rhythm is irregular with a rate of 50/min. There are upright P waves present with the first three complexes. The PR interval begins to shorten about the 3rd complex and by the 4th complexes the P wave fuses with the QRS complex. The QRS complex remains narrow. No ectopic beats are noted. PR: .12 sec, QRS: .08 sec. QT: .44 sec. Interpretation: NSR changing to a junctional escape rhythm.
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The rhythm is regular with a rate of 93. There are small upright P waves present before each QRS complex. In lead III there are deep Q waves present which may be indicative of an old MI or a new evolving MI. The ST segment is down slopping and the T waves are inverted suggesting inferior ischemia, though you would want to see it in contiguous leads- II, III, or aVF. PR: .12 sec, QRS: .10 sec, QT: .38 sec. Interpretation: Normal sinus rhythm with an inverted T wave
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The rhythm is regular with a rate of 188/min. There are no P waves seen. The QRS complex is wide. No ectopic beats are noted. PR: ---, QRS: .10 sec, QT: .20 sec. Interpretation: Supraventricular tachycardia
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The rhythm is regular. The rate is 150/min. There are not any P waves seen. The QRS is wide suggesting a ventricular origin for the rhythm. No ectopic beats are noted. PR: ---, QRS: ..16 sec, QT: .36 sec. Interpretation: Ventricular tachycardia
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2.
3.
4.
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5.
Answers
1.
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| 2nd degree heart block type II |
The rhythm is regular. The ventricular rate is 30/min. There are upright P waves present but not all of them are associated with a QRS complex. A nonconducted P wave follows each QRS complex. The QRS is wide. The T wave is inverted in lead II. PR: .36 sec, QRS: .12 sec, QT: .52 sec. Interpretation: 2nd degree heart block type II
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| NSR changing to a junctional escape rhythm. |
The rhythm is irregular with a rate of 50/min. There are upright P waves present with the first three complexes. The PR interval begins to shorten about the 3rd complex and by the 4th complexes the P wave fuses with the QRS complex. The QRS complex remains narrow. No ectopic beats are noted. PR: .12 sec, QRS: .08 sec. QT: .44 sec. Interpretation: NSR changing to a junctional escape rhythm.
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| Normal sinus rhythm with an inverted T wave |
The rhythm is regular with a rate of 93. There are small upright P waves present before each QRS complex. In lead III there are deep Q waves present which may be indicative of an old MI or a new evolving MI. The ST segment is down slopping and the T waves are inverted suggesting inferior ischemia, though you would want to see it in contiguous leads- II, III, or aVF. PR: .12 sec, QRS: .10 sec, QT: .38 sec. Interpretation: Normal sinus rhythm with an inverted T wave
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| Supraventricular tachycardia |
The rhythm is regular with a rate of 188/min. There are no P waves seen. The QRS complex is wide. No ectopic beats are noted. PR: ---, QRS: .10 sec, QT: .20 sec. Interpretation: Supraventricular tachycardia
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| Ventricular tachycardia |
The rhythm is regular. The rate is 150/min. There are not any P waves seen. The QRS is wide suggesting a ventricular origin for the rhythm. No ectopic beats are noted. PR: ---, QRS: ..16 sec, QT: .36 sec. Interpretation: Ventricular tachycardia
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