TABLE OF CONTENTS
“My BP is high”
These patients used to make me panic: Do I admit? Lower? Ignore? Review in OPD?
Time to settle this. The AHA has clarified the problem we face every day.
The rapid correction of BP in patients with longstanding hypertension to normal range may result in vital organ hypoperfusion due to loss of autoregulation
So here’s the simple, practical ER approach.
Is the BP high enough?
Markedly elevated BP is ->180/110–120 mm Hg
But remember - End-organ damage can still occur below these numbers — so don’t rely on BP alone.
What type of elevation is this? (Only 2 possibilities)
- Asymptomatic Markedly Elevated BP
No end-organ damage.
- Hypertensive emergency.
With end-organ damage.
Is there a specific condition causing the elevation?
Look for the why? Why is this BP high?
- Intracranial - IC bleed, Stroke, SAH
- CVS - SCAPE, MI Aortic dissection
- Pre eclampsia
- Pheochromocytoma
Follow condition-specific guidelines
More details on that later
Is there end-organ damage? Use the BARKH checklist
- Brain – ICH, stroke, encephalopathy
- Arteries – aortic dissection
- Retina – papilledema, haemorrhages
- Kidney – rising creatinine, oliguria
- Heart – ACS, acute pulmonary edema
Remember:
- A headache alone does not indicate end-organ damage.
- Epistaxis is not evidence of end-organ damage and is usually unrelated to the BP.
If any, yes → Admit to ICU and initiate IV medications
Only THREE conditions require rapid lowering (<140 or <120)
- Aortic dissection → Target <120 ASAP
- Severe pre-eclampsia/eclampsia → Target <140
- Pheochromocytoma crisis → Target <140
IC bleed and Stroke
- Follow condition-specific guidelines ( More details on that later)
General BP reduction goals
- First hour: ↓ SBP by ~25%
- Next 2–6 hours: Reach ~160/100
- Next 24–48 hours: Gradual return to baseline
Oral therapy is discouraged in hypertensive emergencies.
IV drugs we actually use
Nitroglycerin
- Start: 5 mcg/min
- ↑ by 5 mcg/min every 3–5 min
- Max: 20 mcg/min
✅ Best for ACS / acute pulmonary edema
❌ Avoid in
- Volume depletion
- RV infarct
- Recent PDE-5 inhibitor use (24–48h)
Labetalol
- IV push: 0.3–1 mg/kg (max 20 mg) every 10 min
- Infusion: 0.4–1 mg/kg/hr (max 3 mg/kg/hr)
- Total cumulative dose 300 mg (Repeat every 4-6 hours)
✅ Useful in
- Hyperadrenergic states
- IC Bleed or Stroke
- Aortic Dissection
- Pregnancy
❌ Avoid in:
- Reactive airway disease
- Heart block/bradycardia
- Acute decompensated HF
Which drug for which condition?
Aortic dissection
- Labetalol
- SBP ≤120 within 20 minutes
- Give a beta-blocker BEFORE vasodilator
Eclampsia/pre-eclampsia
- Labetalol
- ❌ Avoid ACEi, ARBs, renin inhibitors, nitroprusside
Acute pulmonary edema
- Nitroglycerin
- ❌ Beta-blockers contraindicated
Acute ICH
- Labetalol
- If SBP >220: reasonable to start continuous IV infusion
- If SBP 150–220: target: reducing SBP to 130–150 mmHg is reasonable, but not below 130 mmHg
Acute coronary syndrome
- Labetalol or nitroglycerin
Acute ischemic stroke
- If tPA-eligible → BP <185/110 before thrombolysis, maintain <180/105
- If not tPA-eligible and BP >220/120 → reduce by 15% in first 24 hrs
If none of the above, it’s likely “Asymptomatic Markedly Elevated BP” (Hypertensive Urgency)
And here is the key message:
Do NOT give PRN antihypertensives.
Do NOT aim to normalise BP in the ED.
Instead, do this:
A. Recheck — is it truly high?
B. Look for reversible causes
- Pain, anxiety, stress
- Sleep deprivation
- Drugs: NSAIDs, steroids, stimulants
- Illicit drugs: cocaine, meth
- IV fluids
- Medication non-adherence (Most common cause)
C. Who actually needs treatment in the ED?
Consider starting or adjusting therapy if:
- Outpatient BPs have been consistently high
- High CVD risk or known target-organ disease
Age under 40: Consider evaluation of secondary causes in OPD.
BP may take days to weeks to adjust to new meds.
Use oral antihypertensives
D What medications to start?
Preferred first-line - Low-dose dual combination therapy (ACE/ARB and /or CCB and/or Diuretic)
My pick: Telmisartan + Amlodipine
→ Excellent ER-friendly combo.
→ Excellent ER-friendly combo.
Monotherapy only if:
- Symptomatic orthostatic hypotension
- Age >85
- Moderate–severe frailty
E Discharge?
✔ Yes.
Give a clear plan + follow-up within 7 days.
Want to Read More?
- 2024 ESC Guidelines for the management of elevated blood pressure and hypertension: Developed by the task force on the management of elevated blood pressure and hypertension of the European Society of Cardiology (ESC) and endorsed by the European Society of Endocrinology (ESE) and the European Stroke Organisation (ESO), European Heart Journal, Volume 45, Issue 38, 7 October 2024, Pages 3912–4018, https://doi.org/10.1093/eurheartj/ehae178
- Bress, Adam P., et al. "The management of elevated blood pressure in the acute care setting: a scientific statement from the American Heart Association." Hypertension 81.8 (2024): e94-e106.
- Writing Committee Members*, et al. "2025 AHA/ACC/AANP/AAPA/ABC/ACCP/ACPM/AGS/AMA/ASPC/NMA/PCNA/SGIM guideline for the prevention, detection, evaluation and management of high blood pressure in adults: a report of the American College of Cardiology/American Heart Association Joint Committee on Clinical Practice Guidelines." Circulation 152.11 (2025): e114-e218.
- Whelton PK, Carey RM, Aronow WS, Casey DE, Collins KJ, Dennison Himmelfarb C, DePalma SM, Gidding S, Jamerson KA, Jones DW, et al. 2017 ACC/AHA/AAPA/ABC/ACPM/AGS/APhA/ASH/ASPC/NMA/PCNA guideline for the prevention, detection, evaluation, and management of high blood pressure in adults: a report of the American College of Cardiology/American Heart Association Task Force on Clinical Practice Guidelines [published correction appears in Hypertension. 2018;71:e140–e144]. Hypertension. 2018;71:e13–e115. doi: 10.1161/HYP.0000000000000065
- Jones, Nicholas R., et al. "Diagnosis and management of hypertension in adults: NICE guideline update 2019." The British Journal of General Practice 70.691 (2020): 90.
- Cuspidi, Cesare, et al. "Treatment of hypertension: The ESH/ESC guidelines recommendations." Pharmacological research 128 (2018): 315-321.
- Greenberg, Steven M., et al. "2022 guideline for the management of patients with spontaneous intracerebral hemorrhage: a guideline from the American Heart Association/American Stroke Association." Stroke 53.7 (2022): e282-e361.
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