I just came home from my cardiac rehab class. At the end of my one-hour session, my heart pressure was 87/65 , with a heart rate of 67. Yesterday, I had an abdominal aortic sonogram that revealed a 4 cm aneurysm. I am 82 years old, and relatively healthy, with the exception of arthritis in my lower back and legs. I do have atherosclerosis, but what is the relationship between this and the aneurysm, particularly in light of my low heart blood pressure?