Will a arotic anuerysm get smaller and go away in time, will a heart murmur go away, from a leakage of a heart valve if you lower blood pressure?

Aneurysm . Neither will go away. If you work with your doctor to keep the pressure down and your system in balance if you have other problems they may not get worse. If you do not take care of yourself they will get worse.
AAA first- An aortic aneurysm will never go away unless it is repaired. Not all aneurysms continue to enlarge, however, and some small aneurysms are safely observed and don't require attention. Enlarging aneurysms, or aneurysms that meet our criteria for repair (typically 5.5 cm) will need to be surgically corrected by a vascular surgeon.