406. Which chambers are paced with a pacemaker? / Advantages & disadvantages of VVI pacemaker / DDD pacer July 10th, 2008 by reuben in pacemaker Back Top Tags: card 405. General indications for pacemaker placement / Indication for AICD / Difference between new generation pacemaker batteries and older batteries / 5-letter pacemaker code 407. Advantages and disadvantages of unipolar vs. bipolar leads / How to differentiate unipolar vs. bipolar lead on ECG / What is the relationship between P waves and QRS complexes in VVI pacing? / Pacemaker complications Leave a Reply Cancel reply Please post any discussion to the emupdates Reddit page.