A wide pulse pressure can indicate a leaky aortic valve, but it can also be seen in hypertension. Given your history of an ascending aortic aneurysm, it wouldn't be unreasonable to have an echocardiogram to look for aortic regurgitation, since one can cause the other. Sometimes, replaced aortic valves become leaky as they get older. It sounds like this could just be from poorly controlled blood pressure, though, and with appropriate BP meds, your systolic should come down and your pulse pressure will be smaller.
Thanks so much for your informative reply. I'll have my yearly echo in May so we'll see how things are then.