Hi Gordon,
Thank you for your question. I would highly recommend that you speak with your doctor about your interest in Viagra or Cialis. With all your medical conditions, it may be best that you avoid such medications, as they could increase the stress already on your heart. It seems that you've already had heart problems, so you would probably want to avoid any more stress on your heart at this point. However, you should ask what your doctor thinks about the situation. Best of luck to you!
Casey