After seeing a high blood pressure educational article on a heart alliance site, how can I tell whether its advice fits me?

First look at who the article says it is for, any prerequisites, and limitations. Then bring the advice you want to use, along with your own medical situation, to your doctor for discussion. You can ask directly: "Does this advice apply to me, and what should be checked first?" If the page does not state its sources or scope of applicability, do not fill in those conditions yourself. Especially when it involves adjusting medication or changing an existing treatment plan, contact the professional responsible for your care first.