Practice EKG Rhythm Strips 101
Identify the following rhythms.
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Answers
1.
The rhythm is irregular and the rate is 60/min. The P waves are upright and are associated with a QRS complex. The 3rd complex arrives early in the cardiac cycle. It's P waves is partially hidden in the T wave of the 2nd complex. The R-R interval between the 1st and 2nd complex is 1.0 sec and the R-R interval between the 5th and 6th complex is .88 sec. PR: .16 sec, QRS: .08 sec, QT: .40 sec.
2.
The rhythm is irregular with some junctional ectopic beats. The rate is 90/min. The P are present and have a corresponding QRS complex. There is some down slopping of the ST segment. The P wave of the 3rd and 10th beat is inverted. PR: .12 sec, QRS: .10 sec, QT: .32 sec
3.
The rhythm is regular with a rate of 60/min. Both atrial and ventricular pacer spikes are present. No ectopic beats are seen. PR: .20 sec, QRS: .16 sec, QT: .44 sec
4.
The rhythm is irregular due to the PVCs. The P waves are positive and arrive before their associated QRS complexes. Interpolated unifocal PVCs are present every 4th beat. A P wave is present before each PVC. A ventricular focus is firing at a regular interval before the sinus impulse reaches the ventricles. PR: .16 sec, QRS: .08 sec, QT: .36 sec.
5.
The rhythm is regular with a rate of 46/min. The P waves are uniform, upright, and precede the QRS complexes. The P waves are slightly biphasic and wide suggesting left atrial enlargement. No ectopic beats are present. There is some down slopping of the ST segment. PR: .16 sec, QRS: .10 sec, QT: .44 sec.
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2.
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4.
5.
Answers
1.
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| Sinus arrhythmia with a PAC |
The rhythm is irregular and the rate is 60/min. The P waves are upright and are associated with a QRS complex. The 3rd complex arrives early in the cardiac cycle. It's P waves is partially hidden in the T wave of the 2nd complex. The R-R interval between the 1st and 2nd complex is 1.0 sec and the R-R interval between the 5th and 6th complex is .88 sec. PR: .16 sec, QRS: .08 sec, QT: .40 sec.
2.
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| Normal sinus rhythm with PJCs |
The rhythm is irregular with some junctional ectopic beats. The rate is 90/min. The P are present and have a corresponding QRS complex. There is some down slopping of the ST segment. The P wave of the 3rd and 10th beat is inverted. PR: .12 sec, QRS: .10 sec, QT: .32 sec
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| AV paced |
The rhythm is regular with a rate of 60/min. Both atrial and ventricular pacer spikes are present. No ectopic beats are seen. PR: .20 sec, QRS: .16 sec, QT: .44 sec
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| Normal sinus rhythm with unifocal PVCs (quadrigeminy) |
The rhythm is irregular due to the PVCs. The P waves are positive and arrive before their associated QRS complexes. Interpolated unifocal PVCs are present every 4th beat. A P wave is present before each PVC. A ventricular focus is firing at a regular interval before the sinus impulse reaches the ventricles. PR: .16 sec, QRS: .08 sec, QT: .36 sec.
5.
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| Sinus bradycardia |
The rhythm is regular with a rate of 46/min. The P waves are uniform, upright, and precede the QRS complexes. The P waves are slightly biphasic and wide suggesting left atrial enlargement. No ectopic beats are present. There is some down slopping of the ST segment. PR: .16 sec, QRS: .10 sec, QT: .44 sec.
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