Practice EKG Rhythm Strips 173
Identify the following rhythms.
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Answers
1.
The rhythm is irregular due to the PVCs. The rate is 80/min. There are flutter waves between the QRS complexes in a 3: 1 ratio. Two multifocal PVCs are present. PR: ---, QRS: .08, QT: .20 sec. With atrial flutter it is sometimes difficult to determine the QT interval because the flutter waves are often embedded in the T waves.
2.
The rhythm is irregular. There is complete AV dissociation with an atrial rate of 60/min and a ventricular rate of 37/min. The P waves are upright but are note associated with the QRS complexes. No ectopic beats are noted. PR: ---, QRS: .14 sec, QT: .44 sec.
3.
The rhythm is irregular due to the many PACs. The rate is 80/min. The P waves are upright and precede the QRS complexes. The P waves of the atrial ectopic beats have some P waves buried in the T waves of the preceding complex, 1, 3, 6, and 8. This is especially evident on complexes 1 and 6. PR: .16 sec, QRS: .06 sec, QT: .36 sec.
4.
The rhythm is irregular due to the presence of the PVCs. The rate is 80/min. The P waves are associated with a QRS complex. There are two unifocal PVCs. The P wave following the PVCs have a PR interval of .20 sec. which is longer than the sinus beats. PR: .16 sec, QRS: .08 sec, QT: .40 sec
5.
The rhythm is irregular with a rate of 60/min. The rate appears to be slowing down which accounts for the irregularity in the rhythm. The R-R interval between the 1st and 2nd complex is 1.24 sec and the R-R interval between the 5th and 6th complex is .84 sec. The P waves are uniform and upright. No ectopic beats are present. PR: .20 sec, QRS: .08 sec, QT: .44 sec.
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2.
3.
4.
5.
Answers
1.
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| Atrial flutter with multifocal PVCs |
The rhythm is irregular due to the PVCs. The rate is 80/min. There are flutter waves between the QRS complexes in a 3: 1 ratio. Two multifocal PVCs are present. PR: ---, QRS: .08, QT: .20 sec. With atrial flutter it is sometimes difficult to determine the QT interval because the flutter waves are often embedded in the T waves.
2.
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| Complete heart block |
The rhythm is irregular. There is complete AV dissociation with an atrial rate of 60/min and a ventricular rate of 37/min. The P waves are upright but are note associated with the QRS complexes. No ectopic beats are noted. PR: ---, QRS: .14 sec, QT: .44 sec.
3.
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| Normal sinus rhythm with frequent PACs |
The rhythm is irregular due to the many PACs. The rate is 80/min. The P waves are upright and precede the QRS complexes. The P waves of the atrial ectopic beats have some P waves buried in the T waves of the preceding complex, 1, 3, 6, and 8. This is especially evident on complexes 1 and 6. PR: .16 sec, QRS: .06 sec, QT: .36 sec.
4.
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| Normal sinus rhythm with unifocal PVCs |
The rhythm is irregular due to the presence of the PVCs. The rate is 80/min. The P waves are associated with a QRS complex. There are two unifocal PVCs. The P wave following the PVCs have a PR interval of .20 sec. which is longer than the sinus beats. PR: .16 sec, QRS: .08 sec, QT: .40 sec
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| Sinus arrhythmia |
The rhythm is irregular with a rate of 60/min. The rate appears to be slowing down which accounts for the irregularity in the rhythm. The R-R interval between the 1st and 2nd complex is 1.24 sec and the R-R interval between the 5th and 6th complex is .84 sec. The P waves are uniform and upright. No ectopic beats are present. PR: .20 sec, QRS: .08 sec, QT: .44 sec.
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