Practice EKG Rhythm Strips 124
Identify the following rhythms.
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Answers
1.
The rhythm looks regular, though this is difficult to tell because of the wandering baseline. The calculated rate is 150/min. There are upright P waves before each QRS complex. The P waves are tall and wide suggesting biatrial enlargement. No ectopy is noted. PR: 12 sec. QRS. 08 sec, QT: .28 sec.
2.
The rhythm is irregular owing to the pause, otherwise the underlying rhythm is regular. The calculated rate is 60/minute. There are upright P waves before each QRS complex. There is a pause lasts 1.4 sec. PR: .20 sec, QRS: .08 sec, QT: .38 sec.
3.
The rhythm is irregular. Notice how the R-R interval slowly gets longer. The R-R interval between the 1st and 2nd complex is .6 sec. The R-R interval between the 7th and 8th complex is .72 sec. The rate is 80. There are upright P waves before each QRS complex. No ectopy is noted. PR: .20 sec, QRS: .08 sec, QT: .36 sec.
4.
The rhythm is irregular. The rate is 130/min. No P waves are present. Some fibrillatory waves are seen between some complexes. No ectopic beats are noted. PR ---, QRS: .12 sec. QT: .36 sec
5.
The rhythm is regular. The calculated rate is 60/min. There are some small biphasic P waves present before each QRS complex. No ectopic beats are present. PR: .12 sec. QRS: .08 sec. QT: .38 sec.
1.
2.
3.
4.
5.
Answers
1.
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| Sinus tachycardia with a wandering baseline |
The rhythm looks regular, though this is difficult to tell because of the wandering baseline. The calculated rate is 150/min. There are upright P waves before each QRS complex. The P waves are tall and wide suggesting biatrial enlargement. No ectopy is noted. PR: 12 sec. QRS. 08 sec, QT: .28 sec.
2.
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| Normal sinus rhythm with sinus pause |
The rhythm is irregular owing to the pause, otherwise the underlying rhythm is regular. The calculated rate is 60/minute. There are upright P waves before each QRS complex. There is a pause lasts 1.4 sec. PR: .20 sec, QRS: .08 sec, QT: .38 sec.
3.
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| Sinus arrhythmia |
The rhythm is irregular. Notice how the R-R interval slowly gets longer. The R-R interval between the 1st and 2nd complex is .6 sec. The R-R interval between the 7th and 8th complex is .72 sec. The rate is 80. There are upright P waves before each QRS complex. No ectopy is noted. PR: .20 sec, QRS: .08 sec, QT: .36 sec.
4.
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| Atrial fibrillation with rapid ventricular response |
The rhythm is irregular. The rate is 130/min. No P waves are present. Some fibrillatory waves are seen between some complexes. No ectopic beats are noted. PR ---, QRS: .12 sec. QT: .36 sec
5.
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| Normal sinus rhythm |
The rhythm is regular. The calculated rate is 60/min. There are some small biphasic P waves present before each QRS complex. No ectopic beats are present. PR: .12 sec. QRS: .08 sec. QT: .38 sec.
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