Brief Answer: Erectile Dysfunction seems to be due to Atheroscle Detailed Answer: Hello Thanks for your query,based on the facts that you have posted it appears that you have problem of Erectile Dysfunction and have been taking Viagra but it has not worked . Considering your age and previous history of Coronary artery disease and triple bypass surgery your problem of erectile dysfunction is most likely to be due to generalised Atherosclerotic process involving Penile Artery too. Penile artery is the main artery that supplies arterial blood to erectile tissue and atherosclerosis of this vessel results into diminished blood flow to erectile tissue being the cause of your erectile dysfunction. Please consult qualified Urologist for clinical examination and hormonal assessment and get Colour Doppler Ultrasound scanning of the penis done to confirm the diagnosis. If proved to be positive you have to consider an option of putting Penile Implant Prosthesis to have sexual enjoyment and to satisfy your partner. Hope I have answered your query ,please feel free to ask if you have more questions , I shall be happy to help you Thanks and Regards. Dr.Patil.

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