Erectile Dysfunction:
A guide to diagnosis and management
In organic ED, the man is usually over 40 years of age and the ED is more likely to be progressive in its presentation. There is usually loss of early morning erections and masturbation is not possible. As the majority of these men are usually in stable, long term relationships, the ED is not situational. A man under the age of 40 years with anxiety related ED may have early morning erections or be able to masturbate without difficulty. The ED may have come on suddenly, be episodic, and occur in some situations and not in others. Naturally, these generalisations are simplifications, and organic and psychological causes are often both present.

Organic causes account for the vast majority of cases of ED and these are primarily vascular in origin, particularly associated with hypertension, ischaemic heart disease and diabetes mellitus.(1)
Erectile dysfunction may be an early predictor of cardiovascular disease. Studies show that 64% of men hospitalised for myocardial infarction had previous ED (2) and 57% of men who had bypass
surgery had previous ED.(3)

Long standing diabetes is also associated with neuropathy and this is important as oral agents are less efficacious in the treatment of ED in these patients. Saenz de Tejada et al. (4) suggest that 75% of men will develop ED within 10 years of onset of diabetes and that ED may not only be a presenting symptom of diabetes mellitus, but that it is significantly predictive of neuropathic symptoms and poor glycaemic control.

Severe depression like any severe chronic illness will be associated with ED, in part because of general malaise, poor circulation and associated reduced desire exacerbated by antidepressants. Performance anxiety and other anxiety related circumstances are also worthy of discussion, as they are not uncommon. While these may contribute to the organically based ED of a middle aged man, they are the usual cause in men under the age of 40 years.

More severe psychiatric disorders, such as entrenched body image problems may require psychiatric referral.

Identifying the problem
Erectile dysfunction is generally under diagnosed and consequently under treated, with only approximately 10% of men with ED having discussed their problem with their doctor.(5) Studies in Europe and
Australia indicate that 75-88% of men with ED are not treated.(6) Many affected men visit their general practitioners for management of other morbidities and others may present for a check up, hoping to be asked about ED. Some suggestions for 'breaking the ice' in inquiring about a patient's sexual life are:
• creating a friendly, nonthreatening atmosphere
(this may be difficult because of pressure of the
waiting room), and
• do not assume sexual orientation or sexual
preference or indeed believe the patient is, or
wishes to be, sexually active.

If a patient presents for a general check up, it is essential to include a sexual history as part of assessing sexually transmitted infection risk as well as sexual dysfunction. A useful approach is:
'Do you suffer from headaches, dizziness, chest pain, reflux, shortness of breath, bowel symptoms, urinary symptoms?'
Then: 'Are you sexually active?'
If the answer is 'No': 'Is this of any concern to you?'
If the answer is 'Yes': 'Do you have any concerns about this?'