Practice EKG Strips 357

Identify the following rhythms.

1.

a. Wenckebach
b. Mobit II
c. 3rd degree block
d. 1st degree block

2.

a. Atrial fibrillation
b. Atrial flutter
c. Ventricular fibrillation
d. Multifocal atrial tachycardia

3.

a. Normal sinus rhythm with PACs
b. Sinus arrhythmia
c. First degree block with PACs
d. Sinus arrest

4.

a. Normal sinus rhythm with multifocal PVCs
b. Normal sinus rhythm with trigeminal PVCs
c. Normal sinus rhythm with a 3 beat run of VT
d. Normal sinus rhythm with bursts of AIVR

5.

a. First degree block
b. Normal sinus rhythm
c. Sinus bradycardia
d. 2nd degree heart block type II

Answers

1. b. Mobit II.  There are some P waves that are associated (paired) with QRS complexes.  The PR intervals on the conducted beats is constant.  There are also some nonconducted P waves.
2. b. Atrial flutter. The rhythm is irregular which allows us to see some of the flutter waves in between the QRS complexes. There is what looks like a PVC following the 5th complex.
3. c. First degree block with PACs. The PR interval is around .28 sec. The PACs are the 3rd and 7th complexes. The P waves of the PACs are buried in the T waves of their preceding complexes. Notice the notching and change in the contour of the T waves
4. c. Normal sinus rhythm with a 3 beat run of VT. The rhythm is irregular due to the salvos of VT.
5. c. Sinus bradycardia. The rhythm is regular. The rate is around 51 bpm. No ectopic beats are noted. Borderline first degree block with a PR interval at .20 sec