Depending on what condition you have, you might receive one of the following types of pacemaker. 1)Single chamber pacemaker- Usually this type takes electrical impulses into your heart's right ventricle (lower heart chamber). This type of pacemaker consists of one lead that connects the pulse generator to one chamber of your heart. Based on your symptoms and the type of pacing that you are getting, doctor may attach the output lead to the right atrium (upper heart chamber) to stimulate the pacing in that chamber. 2)Dual chamber pacemaker - Usually this type takes electrical impulses into your heart's both chambers (lower heart chamber and upper heart chamber) to help control the timing of contractions between the two chambers. Dual chamber pacemaker helps the two chambers work together and contract which allow blood to flow properly from the right atrium into the right ventricle. The chambers relax in the proper rhythm. 3)Biventricular pacemaker - Biventricular pacing is used for patients with heart failure with abnormal electrical systems. This kind of pacemaker is used to improve the heart function by stimulating the right and left ventricles.