New to this forum and could really use some help. Three months ago my husband had a pacemaker implanted and hasn't been the same since. It seems that with any small exertion he becomes lightheaded. This lasts for about a minute and then he stabilizes. It is almost as though his pacemaker isn't able to keep up with him. We are so new to this device and I am doing everything I can to be supportive. We have seen the cardiologist along with the Abbott people twice now and they have "tweeked" it twice. Any information that you can supply will be truly appreciated.