Erectile dysfunction (ED) is a common condition defined by the inability to achieve and sustain an erection adequate for sexual intercourse. Population studies estimate a prevalence of between 32% and 52% for all grades of ED.^1,2 ED is more common as age increases, and one study found the prevalence of complete ED to triple, from 5% to 15%, between the ages of 40 and 70.² there is increasing evidence to support a vascular aetiology. ED and cardiovascular disease (CVD) share common risk factors. So modifying risk factors for CVD may lead to an improvement in erectile function. Early identification of ED may also provide a window of opportunity in which clinicians can take preventative measures against the development of CVD. There is increasing evidence to support a vascular aetiology. ED and cardiovascular disease (CVD) share common risk factors. So modifying risk factors for CVD may lead to an improvement in erectile function. Early identification of ED may also provide a window of opportunity in which clinicians can take preventative measures against the development of CVD. [ With external links to the evidence base]