Practice EKG Rhythm Strips 159
Identify the following rhythms.
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Answers
1.
The rhythm is irregular. The rate is 70/min. There are flutter waves in between the QRS complexes. There is a variable block of 3:1 and 4:1. No ectopic beats are seen. PR: ---, QRS: .08 sec, QT: .28 sec.
2.
The rhythm is irregular due to the unifocal PVCs. The rate is 70/min (don't forget to measure out the 6 second interval and count the number of R waves in it then multiply that number by 10). With the exception of the PVCs, there are upright P waves present. There are unifocal PVCs every other beat. If you look on the V1 lead there appears to be some non-conducted P waves buried in the T wave of the PVCs. The P-P interval is fairly consistent from beat to beat. PR: .20 sec, QRS: .08 sec, QT: .36 sec
3.
The rhythm is regular. The calculated rate is 50/min. No P waves are noted before each QRS complex and no ectopic beats are seen. PR: ---, QRS: .08 sec, QT: .38 sec.
4.
The rhythm is irregular due to the PAC (6th complex). The rate is 80/min. There are upright P waves before each QRS complex. The P wave of the 6th complex has a different shape and the PR interval is shorter than the P waves of sinus origin. PR: .20 sec, QRS: .08 sec, QT: .36 sec.
5.
The rhythm is irregular. The rate is 80/min. The P waves are upright but lack uniformity. The P waves of the 2nd and 5th complexes occur early in the cardiac cycle. The 2nd and 5th complexes are PACs that are sensed by the pacemaker. The pacemaker, according to it's programmed settings will fire if a spontaneous ventricular beat is not initiated. It is doing the same for the PACs. There are ventricular pacer spikes present before each QRS complex. PR: .16 sec, QRS: .16 sec, QT: .42 sec.
1.
2.
3.
4.
5.
Answers
1.
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| Atrial flutter with variable block |
The rhythm is irregular. The rate is 70/min. There are flutter waves in between the QRS complexes. There is a variable block of 3:1 and 4:1. No ectopic beats are seen. PR: ---, QRS: .08 sec, QT: .28 sec.
2.
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| Normal sinus rhythm with bigeminal PVCs |
The rhythm is irregular due to the unifocal PVCs. The rate is 70/min (don't forget to measure out the 6 second interval and count the number of R waves in it then multiply that number by 10). With the exception of the PVCs, there are upright P waves present. There are unifocal PVCs every other beat. If you look on the V1 lead there appears to be some non-conducted P waves buried in the T wave of the PVCs. The P-P interval is fairly consistent from beat to beat. PR: .20 sec, QRS: .08 sec, QT: .36 sec
3.
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| Junctional rhythm |
The rhythm is regular. The calculated rate is 50/min. No P waves are noted before each QRS complex and no ectopic beats are seen. PR: ---, QRS: .08 sec, QT: .38 sec.
4.
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| Normal sinus rhythm with PACs |
The rhythm is irregular due to the PAC (6th complex). The rate is 80/min. There are upright P waves before each QRS complex. The P wave of the 6th complex has a different shape and the PR interval is shorter than the P waves of sinus origin. PR: .20 sec, QRS: .08 sec, QT: .36 sec.
5.
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| Ventricular paced |
The rhythm is irregular. The rate is 80/min. The P waves are upright but lack uniformity. The P waves of the 2nd and 5th complexes occur early in the cardiac cycle. The 2nd and 5th complexes are PACs that are sensed by the pacemaker. The pacemaker, according to it's programmed settings will fire if a spontaneous ventricular beat is not initiated. It is doing the same for the PACs. There are ventricular pacer spikes present before each QRS complex. PR: .16 sec, QRS: .16 sec, QT: .42 sec.
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