Practice EKG Rhythm Strips 204
Identify the following rhythms.
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Answers
1.
The rhythm is regular with a ventricular rate of 35 and an atrial rate of 90/min. The P waves are upright and uniform but are not associated with a QRS complex. No ectopic beats are present. The wide QRS complex suggests a ventricular escape mechanism. PR: ---, QRS: .12 sec. QT: .40 sec.
2.
The rhythm is irregular with a heart rate of 40/min. The P waves are upright and uniform. There are P waves associated with some of the QRS complexes but there are also some dropped complexes. On the conducted beats, the PR interval is fixed. A single PVC is present. PR: .36 sec. QRS: 12 sec, QT: .56 sec,
3.
The rhythm is regular and the heart rate is 65/min. The P waves are positive, uniform, and precede the QRS complexes. The PR interval is prolonged. No ectopic beats are identified. PR: .32 sec, QRS: 12 sec, QT: .48 sec
4.
The rhythm is irregular. The rate is 50/min. The P waves are split but are upright and uniform. The PR interval gets progressively longer until a dropped P wave occurs. No ectopic beats are noted. PR: .36/.36/ .40/.44/.44 sec. QRS: .16 sec, QT: .60 sec
5.
The rhythm is regular with a ventricular rate of 33/min. The P waves are positive and uniform. There are some nonconducted P waves that follow each QRS complex. The P waves are wide and split suggesting a left atrial enlargement. The PR interval on the conducted P waves is consistent. No ectopic beats are noted. PR: .36 sec. QRS: .16 sec, QT: .52 sec.
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2.
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4.
5.
Answers
1.
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| Complete heart block |
The rhythm is regular with a ventricular rate of 35 and an atrial rate of 90/min. The P waves are upright and uniform but are not associated with a QRS complex. No ectopic beats are present. The wide QRS complex suggests a ventricular escape mechanism. PR: ---, QRS: .12 sec. QT: .40 sec.
2.
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| 2nd degree AV block with a PVC |
The rhythm is irregular with a heart rate of 40/min. The P waves are upright and uniform. There are P waves associated with some of the QRS complexes but there are also some dropped complexes. On the conducted beats, the PR interval is fixed. A single PVC is present. PR: .36 sec. QRS: 12 sec, QT: .56 sec,
3.
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| 1st degree heart block |
The rhythm is regular and the heart rate is 65/min. The P waves are positive, uniform, and precede the QRS complexes. The PR interval is prolonged. No ectopic beats are identified. PR: .32 sec, QRS: 12 sec, QT: .48 sec
4.
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| 2nd degree AV block type I |
The rhythm is irregular. The rate is 50/min. The P waves are split but are upright and uniform. The PR interval gets progressively longer until a dropped P wave occurs. No ectopic beats are noted. PR: .36/.36/ .40/.44/.44 sec. QRS: .16 sec, QT: .60 sec
5.
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| 2nd degree AV block type II |
The rhythm is regular with a ventricular rate of 33/min. The P waves are positive and uniform. There are some nonconducted P waves that follow each QRS complex. The P waves are wide and split suggesting a left atrial enlargement. The PR interval on the conducted P waves is consistent. No ectopic beats are noted. PR: .36 sec. QRS: .16 sec, QT: .52 sec.
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