What brought you here
Blood pressure that won't come down
You're taking what you were told to take. You've cut the salt. The readings still come back high. That's a specific situation with specific causes, and most of them are findable.
Why a kidney doctor, for blood pressure
Kidneys and blood pressure are the same conversation. Your kidneys control blood pressure directly — through how much salt and fluid they hold onto, and through hormones that tighten or relax your blood vessels. When they aren't working normally, blood pressure rises.
It runs the other way too. Years of high pressure damages the small vessels inside the kidneys, which raises pressure further. Breaking into that loop is a large part of what nephrologists do, and it's why blood pressure that resists ordinary treatment often ends up in a kidney clinic.
Blood pressure that resists treatment usually has a reason
When readings stay above goal on three medications — one of them a water pill — that pattern has a name and a short list of usual explanations. A narrowing in the artery feeding a kidney. An adrenal gland making too much of a salt-retaining hormone. Untreated sleep apnea. A medication working against you, including some very common over-the-counter painkillers.
Several of these are correctable, and some are missed for years simply because nobody went looking. Looking is the point of the visit.
The readings themselves are worth checking
Before adding a fourth medication, it's worth being certain the numbers are real. Cuff size, arm position, a full bladder, and the ten minutes before the reading all move the result — sometimes by a lot. Some people also read high in a clinic and normal everywhere else.
Home readings, taken properly and written down, are often the single most useful thing you can bring to the appointment.
Emergency signs
A very high reading with any of the following is an emergency — call 911:
- Chest pain or shortness of breath.
- Sudden weakness or numbness, trouble speaking, or a drooping face.
- A sudden severe headache unlike your usual ones, or changes in your vision.
- Confusion.
What happens next
How we approach it
- We confirm the readings are accurate, and ask you to bring home measurements if you take them.
- We check kidney function and urine protein, and look at the salt and potassium balance in your blood.
- We look for the correctable causes — narrowed kidney arteries, hormone-driven hypertension, sleep apnea.
- We review everything you take, prescription and otherwise, for anything pushing pressure up.
- We adjust the regimen — often it's the combination and the timing that need changing, not simply another pill.
Questions people ask us about this
What counts as 'resistant' high blood pressure?
The usual definition is blood pressure still above goal while taking three medications from different classes at proper doses, one of which is a diuretic. It's also used when it takes four or more medications to hold blood pressure at goal. Either pattern is worth a specialist's look.
I already cut out salt. Why is it still high?
Cutting salt helps most people, but it can't fix a narrowed kidney artery or an adrenal gland overproducing a hormone. If you've done the work and the numbers haven't moved, that's information — it points toward a cause that diet alone was never going to reach.
Has the high blood pressure already damaged my kidneys?
Sometimes yes, sometimes not at all — and it's checkable with a blood test and a urine test rather than a guess. Even where there is damage, getting pressure to goal is the single most effective thing that slows it down.
Not sure whether you need a kidney specialist?
Call and ask. Our staff will tell you whether this is something we should see, what your plan requires, and what to bring. A real person answers, and the whole staff speaks Spanish.