Hypertensive crisis
A severe, sudden rise in blood pressure — usually a top number above 180 or bottom above 120 — that can damage organs. It is an emergency: with signs of harm to the brain, heart, kidneys or eyes it needs immediate hospital care, and even without them it needs urgent attention.
What it is
A hypertensive crisis is a severe elevation of blood pressure, generally a systolic (top) reading above 180 mmHg or a diastolic (bottom) above 120 mmHg. Doctors divide it into two. A hypertensive emergency means the very high pressure is actively damaging organs — the brain (severe headache, confusion, stroke or seizures), the heart (chest pain, heart attack, heart failure with breathlessness), the kidneys (falling function), the eyes (blurred vision, bleeding at the back of the eye) or the large blood vessels (a tearing aortic pain). This is a true emergency requiring immediate hospital treatment to lower the pressure carefully and controllably. A hypertensive urgency means the pressure is just as high but without evidence of acute organ damage; it still needs prompt medical attention and treatment, though usually not intravenous drugs. Crises often arise in people with known high blood pressure, especially if treatment has been missed or stopped, but can also be triggered by kidney disease, certain hormone-producing tumours, drugs (including stimulants), or pregnancy (pre-eclampsia). The rise must be brought down at a controlled rate, as lowering it too fast can itself cause harm.
Key lab markers
- Creatinine and eGFR — assess acute kidney damage from the high pressure.
- Potassium and other electrolytes — screen for a hormonal cause and monitor the kidneys.
- Troponin — checks for heart-muscle injury if there is chest pain.
- Urinalysis — blood or protein can indicate kidney involvement.
- Further tests — ECG, chest imaging and eye examination look for organ damage; hormone tests if a secondary cause is suspected.
Symptoms
- Very high blood pressure reading
- Severe headache
- Blurred vision or visual disturbance
- Chest pain
- Shortness of breath
- Confusion, difficulty speaking, weakness (possible stroke)
- Nausea and vomiting
- Nosebleed
- Anxiety, a sense of severe unwellness
- Sometimes no symptoms despite a dangerously high reading
Related lab panels
When to discuss with a doctor
A very high blood pressure reading — top number 180 or above, or bottom 120 or above — combined with any of chest pain, breathlessness, severe headache, visual change, confusion, difficulty speaking, weakness, or feeling very unwell is a medical emergency: call emergency services or go to hospital immediately, as organs may be under attack. A reading that high without these warning signs still needs urgent medical attention the same day, not a wait-and-see approach. Blood pressure this high should never be lowered rapidly with a large dose of medication at home, as an abrupt drop can be dangerous; the reduction must be controlled by professionals. If you have high blood pressure, taking treatment consistently is the best way to prevent a crisis. Mediora.AI can highlight markers of organ strain, but a hypertensive crisis is an emergency defined by the blood pressure and symptoms — act immediately.