Orthostatic Hypotension

Question 1

What is orthostatic hypotension.

Answer 1

Unsteadiness or LOC on standing from lying in those with inadequate vasomotor reflexes.

Question 2

Who is at risk of developing orthostatic hypotension. (5)

Answer 2

The elderly. 
Those with autonomic neuropathy. 
Those on antihypertensive medication. 
Overdiuresis. 
Those with multisystem atrophy.

Question 3

What is the aetiology of orthostatic hypotension.

Answer 3

A drop in systolic blood pressure of >20 or more on standing from a sitting or lying position.

Question 4

What mechanism usually prevents orthostatic hypotension in normal individuals.

Answer 4

Reflex vasoconstriction prevents a drop in pressure.