Stages of HIV Infection. Without treatment, HIV advances in stages, overwhelming your immune system and getting worse over time. The three stages of HIV infection are: (1) acute HIV infection, (2) clinical latency, and (3) AIDS (acquired immunodeficiency syndrome).
A pacemaker is a small, battery-powered device that is implanted into your chest to help regulate your heart rate. You need a pacemaker if your heart beat is too slow or is irregular. Your heart may not be able to pump blood well throughout your body. This can happen because of heart failure, aging, or heart medications. You may have the following signs and symptoms:
People with congestive heart failure are often given pacemakers to help their hearts pump more efficiently. But doctors have been puzzled by about 40 percent of people given those devices who don't get any better. They often wind up in the hospital, or they die. Now researchers say they've got the problem figured out.