Eating well, exercise, sleep - these are all things we can control when it comes to our health. But unfortunately, some health-related things are out of sight, and therefore, often out of mind. Hidden health issues can escalate for years before becoming potentially life-threatening. For example, the term "silent killer" refers to fatal medical conditions that often exhibit no warning signs. High blood pressure is one such condition that many people are familiar with, but there is another very serious condition that most people have never heard of: abdominal aortic aneurysm.