Practice EKG Strips 383

Identify the following rhythms.

1.

a. Sinus bradycardia with first degree block
b. Sinus rhythm with first degree block
c. Sinus arrest with first degree block
d. Complete heart block

2.

a. 1st degree block
b. 2nd degree block type I
c. 2nd degree block type II
d. 3rd degree block

3.

a. Atrial flutter with variable ventricular response
b. Atrial fibrillation with controlled rate
c. Sinus arrhythmia
d. 2nd degree AV block type II with 3:1 conduction

4.

a. Atrial paced with couplets
b. Biventricular paced with couplets
c. Dual paced with couplets
d. Ventricular paced with couplets

5.

a. Sinus tachycardia
b. Supraventricular tachycardia
c. Ventricular tachycardia
d. Atrial tachycardia

Answers
1. a. Sinus bradycardia with first degree block.  The PR interval is .028 secs.  The rate is 39 bpm.
2. b. 2nd degree block type I.  You can see the prolongation of the PR interval along successive beats.
3. a. Atrial flutter with variable ventricular response. Varying 2:1 and 3:1 conduction gives this atrial flutter it's irregular rhythm.
4. b. Biventricular paced with couplets but also with some fusion beats (the first PVC and the 3rd PVC have embedded pacer spikes) and with some demand atrial pacing. The last complex has both atrial and ventricular pacing. This follows a rather long compensatory pause after the 2nd couplet.
5. a. Sinus tachycardia. Very small P waves are present in lead II.