Quiz #34 - Temporary Pacemaker

6 month old infant s/p AV septal defect repair. 3^rd postoperative day. Underlying rhythm was 3^rd degree AV block & probable sinus node dysfunction. The rhythm strip was printed to evaluate the temporary pacemaker.

Questions: (Answers are in red-color fonts)

What mode is being used? ….DDD

Comment about Atrial pacing, Atrial sensing and Ventricular pacing?

a.       Is the pacemaker atrial pacing properly? (Yes/No) …No (No P wave after atrial pacing spikes “AP”)

b.      Is the pacemaker atrial sensing properly? (Yes/No) …Yes (When there is a native P wave, no atrial pacing spike. Atrial sensing “AS” properly)

c.       Is the pacemaker ventricular pacing properly? (Yes/No) …Yes (QRS complex follows every ventricular pacing spike “VP”)