Tell us about tests made to make the diagnosis or to, to assess the patient more broadly.

Given how common hypertension is and across the whole spectrum of the population, and the patients who get referred to me in the hypertension service at the Liverpool Heart and Chest, you could argue are the patients who that the general practitioner presumes will need further assessment and investigation for secondary causes of hypertension.

I'll come back to that in a second.

Or those with resistant hypertension or drug intolerances.

Now, it's worth start making the point that for in terms of hypertension, majority of patients are essential or idiopathic hypertension, and broadly speaking, it's about nine out of ten where there's, there's no underlying reason.

Now, that's the whole population.

In younger patients, I think it's important to look harder for other reasons for hypertension, whether it's, for example, hypertension related to hormonal things.

What's the mainstay of management?