erectile dysfunction
Meaning of erectile dysfunction: Often the first visible sign of narrowed arteries elsewhere, which is why it is treated as a cardiovascular finding and not only a sexual one.
Definition of erectile dysfunction
Erectile dysfunction is a persistent inability to get or keep an erection firm enough for sex. An occasional failure is ordinary and does not count; the label applies when the difficulty is repeated and lasting. An erection depends on nerves, arteries, veins, hormones and desire acting together, so a problem anywhere in that chain can produce it.
What causes it?
More than one cause is usually at work, and a physical trigger often brings a psychological one along behind it.
| Group | Examples |
|---|---|
| Vascular | Narrowed or stiff arteries, so inflow is too weak; leaking veins, so the erection is not held |
| Neurologic | Nerve damage from long-standing diabetes, pelvic or prostate surgery, spinal cord injury, multiple sclerosis |
| Hormonal | Low testosterone, thyroid disorders, raised prolactin |
| Medicines and substances | Some blood pressure drugs, antidepressants, antipsychotics, heavy alcohol use, tobacco |
| Psychological | Stress, low mood, relationship difficulty, performance anxiety after an early failure |
Long-standing diabetes mellitus is prominent because it damages both the small arteries and the nerves that supply the penis, and high blood pressure contributes both through the arteries themselves and through some of the medicines used to control it.
Why is it treated as a cardiovascular finding?
The arteries supplying the penis are narrower than the coronary arteries. Where a disease process is thickening artery walls throughout the body, the narrow vessels lose their reserve first, so difficulty with erections can appear before any chest symptom. That is why the finding often prompts a wider look at blood pressure, blood sugar, cholesterol and smoking rather than being addressed on its own. The same risk factors drive both problems, and the overlap is close enough that erectile difficulty is treated as a signal worth investigating.
What does the pattern of onset suggest?
A sudden change, particularly when erections still occur during sleep or on waking and the difficulty is confined to certain situations or partners, points toward a psychological contributor or a newly started medicine. A slow loss over months to years, present in every situation, points toward a vascular, neurologic or hormonal cause. The distinction is a guide rather than a rule, since pelvic surgery or a nerve injury can also produce an abrupt change, and anxiety after a first failure commonly settles on top of a physical cause and makes it worse.
Also known as
Used in a sentence
The patient was evaluated for erectile dysfunction that had developed gradually over the preceding months.
Good to know
A sudden onset, especially when erections still occur during sleep or on waking, more often points toward a psychological contributor or a newly started medicine, while a gradual loss present in every situation more often reflects a vascular, neurologic or hormonal cause.
Word origin
Where “erectile dysfunction” comes from
Formed from erectile, from Latin erigere, meaning to raise up, and dysfunction, from dys-, Greek for difficult or abnormal, combined with function, from Latin functio, meaning performance.