What is the reason for the elderly panic dizziness

Old people palpitate dizziness is what reason: because the blood vessels of the elderly are relatively young people are degenerated, hardening changes, so the elderly show frequent palpitations, dizziness, must rule out cardiovascular and cerebrovascular problems, such as coronary heart disease, cerebrovascular stenosis, cerebral blood supply deficiency, carotid artery stenosis, carotid plaque a series of cardiovascular and cerebrovascular problems.