a. Ventricular tachycardia
b. Supraventricular tachycardia
c. Atrial tachycardia
d. Sinus tachycardia
a. Atria paced
b. Ventricular paced
c. Accelerated idioventricular rhythm
d. Ventricular tachycardia
a. Compete heart block
b. 2nd degree heart block type II
c. 2nd degree heart block type I
d. First degree block
a. Ventricular paced
b. AV paced
c. Atrial paced
d. AV paced
a. Junctional rhythm
b. Idioventricular rhythm
c. Complete heart block
d. Atrial fibrillation
1. b. Supraventricular tachycardia. The rate is 150/min. The rhythm is regular. No P waves. The QRS complexes are narrow. No ectopic beats. PR: ---, QRS: .08 sec, QT: .36 sec.
2. b. Ventricular paced. The rhythm is regular. The rate is 71/min. No P waves are seen. 100% ventricular paced.
3.a. Compete heart block. In the first complex, the PR interval is different than the other two. It is very prolonged. In the remaining two complexes the PR interval is the same. So the rhythm takes on a type II characteristic. There are dropped beats that follow each QRS complex. The atrial rate is 60/min and the ventricular rate is 31/min. The QRS complexes are narrow so the block must be at the level of the AV junction
4. c. Atrial paced. The rhythm looks regular. The rate is 75/min. Pacer spikes are seen before each P wave. The QRS complexes are wide. Some T wave inversion is present. The A-V interval has a prolonged setting of .28 sec. QRS: .12 sec, QT: .44 sec.
5. a. Junctional rhythm. B is incorrect because the QRS complexes are not wide and the rate is too fast for an idioventricular rhythm. C. is not correct because we do not see any nonconducted P waves. D is not correct because the rhythm is regular and we do not see any fibrillatory activity between the QRS complexes.