ECG Rhythm Strips 88
Identify the following rhythms
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Answers
1. 1st degree block with unifocal PVCs (Quadrigeminy)
The rhythm is irregular due to the ventricular ectopy. The P waves are upright and have a corresponding QRS complex. The PR interval is prolonged. PVCs are seen every 4th beat. A compensatory pause follows each PVC. The ST segment is up slopping. PR: .26 sec, QRS: .08 sec, QT: .44 sec.
2. 2nd degree heart block type I
The rhythm is irregular with a rate of 50/min. The P waves are upright. There is progressive prolongation of the PR interval. A dropped complex follows the 2nd, 3rd, and 7th complexes. No ectopic beats are noted. PR: ---, QRS: .08, QT: .40 sec.
3. Atrial fibrillation with slow ventricular response
The rhythm is irregular with a rate of 30/min. No P waves are present. There is fibrillatory waves between the QRS complexes. No ectopy is present. PR: ---, QRS: .08 sec, QT: .36 sec.
4. Atrial flutter with unifocal PVCs
The rhythm is irregular with a rate of 70/min. Flutter waves are seen between the QRS complexes. Two unifocal PVCs are present. PR: ---, QRS: .08 sec, QT: .08 sec.
5. NSR with unifocal PVCs. Notice the P waves buried within the PVCs!
The rhythm is irregular due to the PVCs. The rate is 70/min. The P waves are upright and precede a QRS complex. There appear to be nonconducted P waves buried within the PVCs. The unifocal PVCs are followed by a compensatory pause. PR: .16 sec, QRS: 08 sec, QT: .36 sec.
1.
2.
3.
4.
5.
Answers
1. 1st degree block with unifocal PVCs (Quadrigeminy)
The rhythm is irregular due to the ventricular ectopy. The P waves are upright and have a corresponding QRS complex. The PR interval is prolonged. PVCs are seen every 4th beat. A compensatory pause follows each PVC. The ST segment is up slopping. PR: .26 sec, QRS: .08 sec, QT: .44 sec.
2. 2nd degree heart block type I
The rhythm is irregular with a rate of 50/min. The P waves are upright. There is progressive prolongation of the PR interval. A dropped complex follows the 2nd, 3rd, and 7th complexes. No ectopic beats are noted. PR: ---, QRS: .08, QT: .40 sec.
3. Atrial fibrillation with slow ventricular response
The rhythm is irregular with a rate of 30/min. No P waves are present. There is fibrillatory waves between the QRS complexes. No ectopy is present. PR: ---, QRS: .08 sec, QT: .36 sec.
4. Atrial flutter with unifocal PVCs
The rhythm is irregular with a rate of 70/min. Flutter waves are seen between the QRS complexes. Two unifocal PVCs are present. PR: ---, QRS: .08 sec, QT: .08 sec.
5. NSR with unifocal PVCs. Notice the P waves buried within the PVCs!
The rhythm is irregular due to the PVCs. The rate is 70/min. The P waves are upright and precede a QRS complex. There appear to be nonconducted P waves buried within the PVCs. The unifocal PVCs are followed by a compensatory pause. PR: .16 sec, QRS: 08 sec, QT: .36 sec.
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