• Affects at least half of all men over the age of 40 years to some degree

  • Prevalence of moderate to severe ED increases with age (see Table 12.1)

  • Erectile function is a complex mechanism

  • ED is a multi-factorial phenomenon-factors are rarely present in isolation but commonly occur in a synergistic combination

  • Causative factors can be broadly classified as—

  • Psychogenic—due to a variety of stressful psychological and lifestyle problems

  • Organic

  1. a.

    Vascular—most common cause. Risk factors include hypertension, diabetes mellitus, atherosclerosis, hyperlipidemia, obesity, pelvic injury, and smoking

  2. b.

    Neurogenic—causes include diabetes mellitus, alcoholism, multiple sclerosis, stroke, depression, Parkinson’s disease, spinal cord injury, brain trauma

  3. c.

    Endocrine—androgen deficiency and hyperprolactinemia



Erectile Dysfunction Male Infertility Peak Systolic Velocity Unexplained Infertility Pelvic Injury 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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© Springer-Verlag London Limited 2007

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