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Section: Erectile Dysfunction (list 1)
Clinical Tests Used to Diagnose ED
Duplex ultrasound (Duplex ultrasound is used to evaluate blood flow, venous leak, signs of atherosclerosis, and scarring or calcification of erectile tissue. Injecting prostaglandin, a hormone-like stimulator produced in the body, induces erection. Ultrasound is then used to see vascular dilation and measure penile blood pressure. ...Section: Erectile Dysfunction
Other articles from the section: Erectile Dysfunction
Overview and symptoms
Erectile dysfunction is characterized by the regular or repeated inability to obtain or maintain an erection. There are several ways that erectile dysfunction is analyzed: Obtaining full erections at some times, such as when asleep (when the mind and psychological issues, if any, are less present), tends to suggest the physical structures are functionally working. However, the opposite case, a lack of nocturnal erections, does not imply the ...Section: Erectile Dysfunction
Causes
Drugs (Anti-depressants (SSRIs) and Nicotine are most common. A study entitled "Drug-induced mal sexual dysfunction" concluded that of the 12 most commonly prescribed medications on the market today, 8 of those medications list "impotence" as a side-effect of the drug. Other drugs such as alcohol, cocaine, and heroin negatively impact male sexual ...Section: Erectile Dysfunction
Oral treatment
The cyclic nucleotide phosphodiesterases constitute a group of enzymes that catalyse the hydrolysis of the cyclic nucleotides cyclic AMP and cyclic GMP. They exist in different molecular forms and are unevenly distributed throughout the body. One of the forms of phophodiesterase is termed PDE5. The prescription PDE5 inhibitors sildenafil (Viagra), vardenafil (Levitra) and tadalafil (Cialis) are prescription drugs which are taken orally. They work by blocking the action of PDE5, which causes cGMP to ...Section: Erectile Dysfunction