We know controlling blood pressure is medically advised for an aorta anuerysm. The higher the altitude the lower the oxygen conncentration with decreased pressure leads to physiological changes in the body. Difficulty in breathing due to lower oxygen concentration in the atmosphere, medically known as hypoxia, is a major cause of concern. This condition leads to increased respiration and high blood pressure.
With medication, the blood pressure may be controlled and no problem. However, it may be wise to consult with your doctor. I know that lifting heavy weights is not advised because it can cause a spike of blood pressure and cause harm.
Thanks for your question, take care.