'He's dizzy when he stands up': an introduction to initial orthostatic hypotension.

摘要

The most frequent orthostatic complaint in young people is lightheadedness or dizziness on rapid standing, sometimes from a seated position, most often from a supine position after hours of recumbency. The most common complainant is an adolescent in the middle of a growth spurt. Often the patient is already tall or is growing rapidly. Similar complaints are seen among young people of either sex, particularly in patients of slender build and reduced blood volume. The complaints relate to normal physiology shared by people of all ages and have been identified by students of orthostasis in the past. Typically, there is transient pallor, perhaps some loss of postural tone, blurred vision or even loss of vision (black out, white out, spots), and less commonly, loss of consciousness.