Routine medical monitoring as part of ongoing management for a condition like aortic dissection does not typically need to be declared unless there are specific changes in your condition or treatment that arise from these check-ups. Regular monitoring is considered a standard part of managing existing conditions and usually doesn’t impact insurance assessments unless it leads to a change, such as a new diagnosis or alteration in medication. However, if your monitoring reveals changes that affect your health status, these should indeed be declared. This ensures there is no ambiguity in your insurance cover, particularly in the event of a claim. Always keep your insurer informed about any significant changes in your health as part of your ongoing duty to provide accurate and up-to-date information.