There are no formal tests to diagnose erectile dysfunction. Some blood tests are generally done to exclude underlying disease, such as hypogonadism and prolactinoma. Impotence is also related to generally poor physical health, poor dietary habits, obesity, and most specifically cardiovascular disease such as coronary artery disease and peripheral vascular disease. Therefore, a thorough physical examination is helpful, in particular the simple search for a previously undetected groin hernia since it can affect sexual functions in men and is easily curable.[11]

A useful and simple way to distinguish between physiological and psychological impotence is to determine whether the patient ever has an erection. If never, the problem is likely to be physiological; if sometimes (however rarely), it could be physiological or psychological. The current diagnostic and statistical manual of mental diseases (DSM-IV) has included a listing for impotence.
Dr. Shiel received a Bachelor of Science degree with honors from the University of Notre Dame. There he was involved in research in radiation biology and received the Huisking Scholarship. After graduating from St. Louis University School of Medicine, he completed his Internal Medicine residency and Rheumatology fellowship at the University of California, Irvine. He is board-certified in Internal Medicine and Rheumatology.
Erectile dysfunction (Disfunción eréctil). National Kidney and Urologic Diseases Information Clearinghouse (Centro Coordinador Nacional de Información sobre las Enfermedades Renales y Urológicas, NKUDIC). https://www.niddk.nih.gov/health-information/health-topics/urologic-disease/erectile-dysfunction/Pages/facts.aspx. Último acceso: 26 de noviembre de 2016.
Entre las causas psíquicas se encuentran el miedo a fallar, la ansiedad, el estrés, la tensión y el nerviosismo. Todas ellas influyen de manera negativa puesto que estimulan la producción de adrenalina por parte del sistema nervioso, que afecta al ritmo cardíaco y disminuye el grosor de las arterias. Como consecuencia de la vasoconstricción que se produce, la circulación de la sangre al pene llega defectuosa. Además, existen casos de causas mixtas donde pueden coexistir las orgánicas y psíquicas.
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