ECG Rhythm Strips 84
Identify the following rhythms.
1.
a. Normal sinus rhythm with sinus arrest
b. Sinus arrhythmia
c. 1st degree block with a sinus block
d. 2nd degree AV block type II
2.
a. Normal sinus rhythm with PACs
b. Normal sinus rhythm with PJCs
c. Normal sinus rhythm with PVCs
d. Sinus arrhythmia
3.
a. Normal sinus rhythm
b. 1st degree block with sinus arrhythmia
c. Normal sinus rhythm with frequent junctional beats
d. Normal sinus rhythm with frequent premature atrial contractions
4.
a. Multifocal atrial tachycardia
b. Atrial tachycardia
c. Junctional tachycardia
d. Ventricular tachycardia
5.
a. Sinus arrhythmia with PACs
b. 2nd degree AV block type I
c. Normal sinus rhythm with PACs
d. Normal sinus rhythm with a sinus exit block
Answers
1. c. 1st degree block with a sinus block
The rhythm is irregular due to the pause. The rate is 70/min. The P waves are positive and have a corresponding QRS complex. The PR interval is prolonged. No ectopy is present. A 1.0 sec pause is present. PR: .24 sec, QRS: .08 sec, QT: .28 sec.
2. a. 1st degree block with PACs
The rhythm is irregular due to the atrial ectopy. The P waves are upright and are associated with a QRS complex. Two PACs are present, the 3rd and 6th complexes. The P waves of the PACs are buried in the T wave of the previous complex. Notice the change in the height of T wave has changed (seen best in the V1 lead). PR: .22 sec, QRS: .12 sec, QT: .44 sec
3. c. Normal sinus rhythm with frequent junctional beats
The rhythm is irregular with a rate of 90/min. There are both positive and negative P waves present. Frequent PJCs are seen in somewhat of a bigeminal pattern. PR: .14 sec, QRS: .08 sec, QT: .34 sec.
4. d. Ventricular tachycardia
The rhythm is regular with a sustained monomorphic ventricular tachycardia. The rate is 188/min. No P waves are seen.
5. a. Sinus arrhythmia with a PAC
The rhythm is irregular with a rate of 60/min. The P waves are upright and precede the QRS complex. The P waves are split. There is a PAC present, the 3rd complex. The morphology of the P waves is different from the sinus P waves. PR: .16 sec, QRS: .08 sec, QT: .40 sec.
Reviewed 3/9/16
1.
a. Normal sinus rhythm with sinus arrest
b. Sinus arrhythmia
c. 1st degree block with a sinus block
d. 2nd degree AV block type II
2.
a. Normal sinus rhythm with PACs
b. Normal sinus rhythm with PJCs
c. Normal sinus rhythm with PVCs
d. Sinus arrhythmia
3.
a. Normal sinus rhythm
b. 1st degree block with sinus arrhythmia
c. Normal sinus rhythm with frequent junctional beats
d. Normal sinus rhythm with frequent premature atrial contractions
4.
a. Multifocal atrial tachycardia
b. Atrial tachycardia
c. Junctional tachycardia
d. Ventricular tachycardia
5.
a. Sinus arrhythmia with PACs
b. 2nd degree AV block type I
c. Normal sinus rhythm with PACs
d. Normal sinus rhythm with a sinus exit block
Answers
1. c. 1st degree block with a sinus block
The rhythm is irregular due to the pause. The rate is 70/min. The P waves are positive and have a corresponding QRS complex. The PR interval is prolonged. No ectopy is present. A 1.0 sec pause is present. PR: .24 sec, QRS: .08 sec, QT: .28 sec.
2. a. 1st degree block with PACs
The rhythm is irregular due to the atrial ectopy. The P waves are upright and are associated with a QRS complex. Two PACs are present, the 3rd and 6th complexes. The P waves of the PACs are buried in the T wave of the previous complex. Notice the change in the height of T wave has changed (seen best in the V1 lead). PR: .22 sec, QRS: .12 sec, QT: .44 sec
3. c. Normal sinus rhythm with frequent junctional beats
The rhythm is irregular with a rate of 90/min. There are both positive and negative P waves present. Frequent PJCs are seen in somewhat of a bigeminal pattern. PR: .14 sec, QRS: .08 sec, QT: .34 sec.
4. d. Ventricular tachycardia
The rhythm is regular with a sustained monomorphic ventricular tachycardia. The rate is 188/min. No P waves are seen.
5. a. Sinus arrhythmia with a PAC
The rhythm is irregular with a rate of 60/min. The P waves are upright and precede the QRS complex. The P waves are split. There is a PAC present, the 3rd complex. The morphology of the P waves is different from the sinus P waves. PR: .16 sec, QRS: .08 sec, QT: .40 sec.
Reviewed 3/9/16
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