Practice EKG Rhythm Strips 178
Identify the following rhythms.
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Answers
1.
The rhythm is irregular. The rate is 70/min. There are upright P waves present but they are not all associated with a QRS complex. The dropped P waves are hidden within the T waves of the 2nd, 4th, and 6th complexes. The PR interval gets progressively longer over successive beats. No ectopic beats are noted. PR: ---, QRS: .16 sec. QT: .40 sec.
2.
There is AV dissociation so the atria and ventricles are depolarizing at different rates and rhythms. The atrial rhythm is irregular. The ventricular rhythm is regular. The atrial rate is 70/min and the ventricular rate is 40/min. There are upright, uniform P waves but they lack a 1:1 association with a QRS complex. No ectopic beats are noted. PR: ---, QRS: .12 sec, QT: .50 sec
3.
The rhythm is regular with a rate of 71/min. There are upright P waves present. Some morphological variation is noted. The are no ectopic beats present. The PR interval is prolonged. PR: .28 sec, QRS: .10 sec, QT: .44 sec.
4.
The rhythm is irregular and the rate is 50/min. There are upright, uniform P waves but not all are associated with a QRS complex. There is a non-conducted P wave after the 3rd complex. The PR interval progressively gets longer over successive beats. There is ST depression with some inversion of the T wave. PR: ---, QRS: .08 sec, QT: .38 sec.
5.
The rhythm is irregular with a rate of 50/min. The P waves are upright but not all are conducted. There is a dropped P wave after the 2nd complex. The PR interval is the same on the conducted beats. No ectopic beats are noted. PR: .16 sec, QRS: .12 sec, QRS: .26 sec.
1.
2.
3.
4.
5.
Answers
1.
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| 2nd degree heart block type I |
The rhythm is irregular. The rate is 70/min. There are upright P waves present but they are not all associated with a QRS complex. The dropped P waves are hidden within the T waves of the 2nd, 4th, and 6th complexes. The PR interval gets progressively longer over successive beats. No ectopic beats are noted. PR: ---, QRS: .16 sec. QT: .40 sec.
2.
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| 3rd degree heart block |
There is AV dissociation so the atria and ventricles are depolarizing at different rates and rhythms. The atrial rhythm is irregular. The ventricular rhythm is regular. The atrial rate is 70/min and the ventricular rate is 40/min. There are upright, uniform P waves but they lack a 1:1 association with a QRS complex. No ectopic beats are noted. PR: ---, QRS: .12 sec, QT: .50 sec
3.
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| 1st degree heart block |
The rhythm is regular with a rate of 71/min. There are upright P waves present. Some morphological variation is noted. The are no ectopic beats present. The PR interval is prolonged. PR: .28 sec, QRS: .10 sec, QT: .44 sec.
4.
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| 2nd degree heart block type I |
The rhythm is irregular and the rate is 50/min. There are upright, uniform P waves but not all are associated with a QRS complex. There is a non-conducted P wave after the 3rd complex. The PR interval progressively gets longer over successive beats. There is ST depression with some inversion of the T wave. PR: ---, QRS: .08 sec, QT: .38 sec.
5.
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| 2nd degree heart block type II |
The rhythm is irregular with a rate of 50/min. The P waves are upright but not all are conducted. There is a dropped P wave after the 2nd complex. The PR interval is the same on the conducted beats. No ectopic beats are noted. PR: .16 sec, QRS: .12 sec, QRS: .26 sec.
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