Figure 16 p

Chest x-ray showing a single lead in the heart. Note the bipolar electrodes in the atrium and the single electrode in the ventricle. This pacemaker system is capable of VDD pacing. Therefore, it senses atrial depolarizations and can pace or sense in the ventricle.

Mitrani,R.D. and others,Cardiac Pacemakers,Hurst's The Heart,10th edition,Vol.1,pp.963-992