Hypertension

01

What it is

Hypertension means blood pressure remains high enough over time to increase damage to arteries and organs. Thresholds and targets differ somewhat among international guidelines, so one isolated reading should not be treated as a universal diagnosis. The clinically useful question is whether the average pressure, measured correctly, creates enough overall risk to justify lifestyle changes, medicine, or both.

Sources for this section: [1] [3]

02

Symptoms and how it may present

Blood pressure reflects the force of blood against vessel walls and is written as systolic over diastolic pressure. Hypertension means readings remain above the diagnostic threshold used in the relevant guideline and setting. A single high reading during pain, stress, illness, caffeine use, or poor measurement is not always chronic hypertension, and most people with established hypertension feel normal.

Sources for this section: [1] [3]

03

Causes and risk factors

Age, genes, kidney disease, diabetes, sleep apnea, some endocrine disorders, medicines, alcohol, sodium intake, tobacco, activity, weight, stress, and environmental exposures can contribute. Most hypertension has no single removable cause, but abrupt onset, very young age, resistant readings, low potassium, kidney findings, or characteristic symptoms may prompt evaluation for a secondary cause. Social conditions influence access to healthy food, safe activity, reliable devices, and consistent medication.

Sources for this section: [1] [2]

04

Diagnosis and tests

Tests should answer a clinical question and be interpreted together with symptoms, examination, and history.

Confirmation usually requires repeated, correctly performed measurements, sometimes with validated home or 24-hour monitoring. The cuff must fit, the arm should be supported, and the person should rest before measurement. Assessment also considers smoking, diabetes, cholesterol, kidney function, family history, medicines, sleep apnea, and signs that another condition may be raising pressure.

Sources for this section: [1] [2] [3]

05

Treatment options

The best option depends on severity, other conditions, likely benefit and harm, access, and personal priorities.

Treatment targets depend on total cardiovascular risk, age, frailty, pregnancy, kidney disease, diabetes, side effects, and the guideline being used. Common medicines include ACE inhibitors or ARBs, calcium-channel blockers, and thiazide-like diuretics. Many people need more than one. Doses should be adjusted with follow-up rather than stopped because a reading has improved.

Sources for this section: [2] [4]

06

Daily life and supportive care

Reducing sodium, eating more minimally processed plant foods, regular aerobic and strength activity, limiting alcohol, stopping tobacco, sleeping well, and addressing excess weight can lower risk. Potassium-rich foods may help some people but can be unsafe with advanced kidney disease or certain medicines. Potassium supplements and salt substitutes should therefore be discussed with a clinician.

Sources for this section: [1] [2] [4]

07

Monitoring and follow-up

Follow trends that can change a decision rather than collecting measurements without a purpose.

Use a validated upper-arm cuff of the correct size, rest before measuring, support the arm, avoid talking, and take readings on multiple days according to the agreed protocol. Record the values rather than only “good” or “bad.” Follow-up also considers dizziness on standing, kidney function, electrolytes, medicine adherence and adverse effects, home-versus-clinic differences, and total cardiovascular risk. Cuffless watches are not yet a substitute for validated clinical or home devices.

Sources for this section: [2] [3] [4]

08

Complications and long-term outlook

Uncontrolled hypertension contributes to stroke, heart attack, heart failure, atrial fibrillation, kidney disease, vision injury, vascular disease, and cognitive decline. Lowering pressure reduces risk, but treatment that is too intensive for an individual can cause dizziness, falls, electrolyte problems, or kidney changes. The goal is durable risk reduction with a tolerable plan, not the lowest possible number at every moment.

Sources for this section: [1] [2] [4]

09

When to seek urgent help

Very high blood pressure accompanied by chest pain, severe breathlessness, new weakness, difficulty speaking, confusion, seizure, or sudden vision change requires emergency evaluation. Long-term uncontrolled hypertension contributes to stroke, heart attack, heart failure, kidney failure, and vision injury. Do not change medication solely from one home reading; record the result and follow the agreed plan.

Sources for this section: [1] [2] [3]

10

Questions to discuss with a care team

A guideline describes what tends to help groups of people, but it cannot decide what matters most in one person’s life. Revisit the plan when symptoms, function, other illnesses, pregnancy plans, medicine access, side effects, or personal priorities change. Ask for plain-language reasoning and say directly when cost, time, transport, caregiving, or treatment complexity makes a recommendation unrealistic.

• What evidence supports this diagnosis, and is there another condition we still need to rule out?
• What is the treatment goal, and how do the main options differ in benefit, harm, burden, and cost?
• What should be monitored, how often, and what result would change the plan?
• Which symptoms require a routine appointment, urgent assessment, or emergency care?

Sources for this section: [2] [4]