Yes, when there is diffuse disease, it means that there is evidence of plaque in the arteries, spread over larger areas and not concentrated on a few locations.
As long as the plaque does not block the arteries for more than a certain percentage, your husband will be fine and be without symptoms.
It might be wise for him, in order to prevent the plaque from getting worse, to adapt his lifestyle a bit and take medication to lower cholesterol, but if that is necessary, his cardiologist will certainly tell him.
Thank you. Yes, he had his cholesterol medication adjusted to a higher dosage. I appreciate you taking the time to answer my question. Have a great afternoon/evening!