Hypertensive Emergencies: EMT Guide

Hypertensive Emergencies: Recognition, Organ Damage and Emergency Management

A high blood-pressure number is not the diagnosis by itself. A hypertensive emergency is severe blood pressure elevation with acute target-organ injury—brain, heart, aorta, kidneys, eyes or placenta. The number, symptoms, measurement accuracy and organ damage must be interpreted together. EMTs should repeat the reading correctly, assess ABCDE, identify stroke/ACS/pulmonary oedema/aortic dissection/eclampsia, avoid unsafe rapid lowering and arrange monitored hospital care. Follow current Uganda hypertension and emergency protocols.

1. Learning objectives

Differentiate hypertensive emergency, severe asymptomatic hypertension and transient stress elevation.
Recognise acute target-organ injury and life-threatening complications.
Measure blood pressure correctly and perform focused ABCDE assessment.
Explain controlled reduction, IV medicines, monitoring and referral principles.
Provide nursing care, medication reconciliation, prevention and discharge teaching.

2. Key definitions

Term	Meaning	EMT action
Hypertensive emergency	Severe BP elevation with acute target-organ injury.	Resuscitation/monitored referral and controlled treatment.
Severe asymptomatic hypertension	Marked BP elevation without evidence of acute organ injury.	Repeat measurement, assess cause/medicines and arrange timely review; do not rapidly normalise.
Hypertensive urgency	Older term sometimes used for severe BP without acute injury; terminology varies.	Prioritise clinical findings over the label and avoid unnecessary IV treatment.
Target-organ injury	Acute brain, heart, aorta, kidney, retina or placental damage.	Look for symptoms even when the patient does not feel very ill.

3. Measurement before treatment

Let the patient rest, use the correct cuff size on a supported arm and repeat after correcting pain/anxiety if clinically safe.
Measure both arms when aortic dissection or vascular disease is possible; compare pulse strength.
Check manual and automated readings if unexpected; record position, arm, cuff and time.
Do not let one reading delay treatment of stroke, pulmonary oedema, dissection or eclampsia.
Review recent medicines, missed doses, NSAIDs, steroids, decongestants, stimulants and illicit drugs.

4. Target-organ emergencies

Organ	Clues	Priority
Brain	Confusion, seizure, severe headache, visual loss, focal deficit, encephalopathy or stroke.	Rapid neuro assessment, glucose, CT/stroke pathway and controlled BP strategy.
Heart/lungs	Chest pain, ECG changes, dyspnoea, crackles, pulmonary oedema or heart failure.	ECG, oxygen if hypoxaemic, ACS/pulmonary-oedema pathway and monitored care.
Aorta	Tearing chest/back pain, pulse/BP difference, new murmur, collapse.	Emergency surgical/cardiac referral; avoid isolated vasodilator therapy.
Kidneys	Oliguria, haematuria, rapidly rising creatinine or fluid overload.	Urine/renal tests, fluid assessment and specialist care.
Eyes	Visual loss, retinal haemorrhage or papilloedema.	Urgent medical/ophthalmic evaluation with safe BP reduction.
Placenta	Pregnancy with headache, visual symptoms, epigastric pain, seizures or high BP.	Eclampsia pathway, magnesium/antihypertensive protocols and obstetric referral.

5. ABCDE assessment

Step	Assess	Action
A – Airway	Consciousness, seizures, vomiting and stroke-related weakness.	Protect airway, suction, recovery position if appropriate and prepare ventilation.
B – Breathing	SpO₂, work, crackles, pulmonary oedema and chest pain.	Oxygen for hypoxaemia, upright position and respiratory support.
C – Circulation	BP trends, pulse, perfusion, ECG and tearing pain.	Monitor, IV access, check both arms and urgent specialty escalation.
D – Disability	GCS/AVPU, glucose, pupils, focal deficits and seizures.	Stroke/seizure pathway, glucose treatment and frequent neuro checks.
E – Exposure	Pregnancy, oedema, rash, renal signs, trauma and medication patches.	Check urine, temperature, pregnancy status and precipitating causes.

6. Immediate management principles

Place the patient in a monitored area, establish IV access, perform ECG and repeat BP/neurological observations.
Treat the emergency syndrome, not the number alone: stroke, ACS, pulmonary oedema, dissection and eclampsia have different targets.
Lower BP gradually in most emergencies under a prescribed IV protocol; overly rapid reduction can cause cerebral, coronary or renal ischaemia.
Use IV antihypertensives only in a setting capable of continuous monitoring and titration. The clinician selects agent based on organ injury, pregnancy, heart rate, renal status and local availability.
Do not use sublingual or short-acting agents that cause unpredictable hypotension unless specifically authorised by protocol.

7. Syndrome-specific pathways

7.1 Hypertensive encephalopathy/stroke

Assess FAST/neurological deficits, glucose, seizure, headache and visual symptoms; record last-known-well time.
Activate stroke pathway, obtain brain imaging and follow the stroke-specific BP threshold before lowering.
Do not rapidly normalise BP in suspected ischaemic stroke unless directed; intracerebral haemorrhage has a different target.

7.2 ACS/pulmonary oedema

Obtain ECG, troponin pathway, oxygen for hypoxaemia and sit upright.
Use nitrates/vasodilators only when BP and contraindication checks permit; treat pulmonary oedema with NIV when indicated.
Escalate for ACS reperfusion, cardiogenic shock or arrhythmia.

7.3 Aortic dissection

Sudden tearing chest/back pain, pulse deficit or neurological symptoms are red flags.
Provide analgesia, monitoring and urgent surgical/cardiology transfer; the clinician controls heart rate and pressure with appropriate agents.

7.4 Pregnancy/eclampsia

Ask gestational/postpartum age, headache, visual changes, epigastric pain, oedema and seizures.
Place in left lateral position, protect airway, treat seizures with magnesium according to protocol and arrange urgent obstetric care.

8. Investigations

Serial BP, ECG, pulse oximetry, glucose, neurological observations and urine output.
FBC, electrolytes, urea/creatinine, urinalysis, troponin and pregnancy test where relevant.
Chest X-ray/ultrasound for pulmonary oedema; CT brain for neurological emergency; CT angiography for suspected dissection/PE when stable.
Fundoscopy and echocardiography where available; do not delay emergency referral for nonessential tests.

9. Nursing and EMT care plan

Problem	Interventions	Evaluate
Neurological injury	Frequent GCS/pupils, glucose, seizure precautions and stroke handover.	Consciousness, focal deficits, seizures and headache.
Cardiorespiratory compromise	ECG/SpO₂, upright position, oxygen when indicated, respiratory assessment.	BP, rhythm, oxygenation, crackles and work of breathing.
Medication titration	Infusion pump, BP frequency, line checks and adverse-effect surveillance.	Controlled reduction without hypotension or organ hypoperfusion.
Renal injury	Strict urine/fluid chart, creatinine/electrolytes and avoid nephrotoxins.	Urine output, renal trends and fluid balance.
Anxiety/pain	Calm environment, prescribed analgesia, explanation and reassurance.	Reduced sympathetic stress and improved cooperation.

10. Special populations

Pregnancy/postpartum: treat severe BP and eclampsia urgently with obstetric supervision.
Renal disease: monitor potassium, fluid status and medicine clearance.
Older adults: check orthostatic symptoms, falls, polypharmacy and baseline cognition.
Children: confirm cuff size and use age/weight-specific emergency guidance.
Stimulant toxicity: manage agitation, hyperthermia and chest pain with toxicology/critical-care help; avoid unapproved beta-blocker use.

11. Prevention and discharge

Confirm accurate diagnosis, medication reconciliation, adherence and access before discharge.
Reduce salt, stop tobacco, limit alcohol, maintain healthy weight, exercise safely and manage diabetes/kidney disease.
Teach home BP technique and red flags: severe headache, weakness, chest pain, dyspnoea, confusion, seizures, visual loss or pregnancy symptoms.
Arrange prompt follow-up after severe readings and specialist review after organ injury.

12. Clinical scenarios

Scenario 1 – pulmonary oedema. BP 230/130 with severe dyspnoea, crackles and pink froth. Sit upright, oxygen/NIV as indicated, ECG, IV access and urgent controlled vasodilator/diuretic management by the clinician.

Scenario 2 – stroke. BP 210/115 with facial droop and arm weakness. Check glucose, document onset, activate stroke pathway and avoid indiscriminate rapid BP lowering.

Scenario 3 – dissection. Sudden tearing chest-to-back pain with unequal pulses. Monitor, analgesia and immediate surgical/cardiology referral; do not treat as uncomplicated hypertension.

Scenario 4 – postpartum seizure. A woman three days after delivery has severe headache, high BP and seizure. Protect airway, left lateral position, magnesium/antihypertensive protocol and emergency obstetric referral.

13. Common errors to avoid

Treating the BP number without looking for acute organ injury.
Rapidly normalising BP in stroke or chronic hypertension without a protocol.
Missing aortic dissection, ACS, pulmonary oedema, renal injury or eclampsia.
Using an incorrect cuff or relying on one unconfirmed reading.
Giving sublingual short-acting medicines that cause unpredictable hypotension.
Discharging without medication review, follow-up and warning signs.

Hypertensive emergency check – “TARGET”
T – Take accurate repeated BP
A – Assess ABCDE and symptoms
R – Recognise organ injury
G – Guard against rapid overcorrection
E – ECG, glucose, eyes, urine and investigations
T – Transfer for monitored specialist treatment

14. Revision questions

Differentiate hypertensive emergency from severe asymptomatic hypertension.
List six target-organ injuries.
Why can rapid BP reduction be harmful?
Describe initial management of pulmonary oedema with severe hypertension.
List the red flags for aortic dissection and eclampsia.
Give six prevention and discharge-teaching points.

15. Key take-home points

Hypertensive emergency means severe pressure plus acute organ injury—not a number alone.
Repeat BP correctly, perform ABCDE and identify stroke, ACS, oedema, dissection, renal injury or eclampsia.
Reduce BP in a controlled, syndrome-specific and monitored manner.
Unpredictable rapid-acting medicines and unmonitored treatment can cause harm.
Every patient needs medication review, follow-up and prevention counselling.

Safety note: This is educational content for EMT students. BP targets, IV antihypertensive choice, stroke thresholds, pregnancy treatment and infusion rates require current Uganda protocols and senior/critical-care supervision.

References for further study

WHO: Hypertension fact sheet
WHO cardiovascular conditions: emergency referral principles
CDC: High blood-pressure facts
Uganda Ministry of Health: current hypertension, stroke, obstetric and emergency-care guidelines.