Features of an autonomic neuropathy include:

• Postural hypotension
• Cardiac conduction defects
• Bladder dysfunction
• Gastrointestinal disturbances including delayed gastric emptying
• pupils constrict or dilate slowly in response to changes in light intensity
• reduced response to hypoglycaemia

Postural (also known as orthostatic) hypotension is an abnormal decrease in blood pressure-of at least 20 mm Hg systolic and 10 mm Hg diastolic-within three minutes of standing upright.