Standard guidelines for hypertension
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Standard Guidelines for Hypertension
1. Definitions and Classification
ACC/AHA 2025 (USA) - the most current guideline, replacing 2017
| Category | Systolic (mmHg) | Diastolic (mmHg) |
|---|---|---|
| Normal | < 120 | < 80 |
| Elevated BP | 120-129 | < 80 |
| Stage 1 Hypertension | 130-139 | 80-89 |
| Stage 2 Hypertension | ≥ 140 | ≥ 90 |
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Both the 2017 and 2025 ACC/AHA guidelines retain ≥ 130/80 mmHg as the diagnostic threshold.
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ESC 2024 uses a higher threshold: ≥ 140/90 mmHg for diagnosis (130-139/85-89 mmHg is "high normal," treated with lifestyle only).
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Washington Manual of Medical Therapeutics, p. 74
-
Comprehensive Clinical Nephrology 7e, p. 530+
2. Initial Evaluation
History and exam should assess:
- Target organ damage: LVH, retinopathy, CKD, stroke/TIA history, PAD
- Secondary causes: renal artery stenosis, primary aldosteronism, obstructive sleep apnea, pheochromocytoma, Cushing syndrome
- Drug/substance contribution: cocaine, sympathomimetics, NSAIDs, OCPs, alcohol withdrawal, clonidine rebound
Baseline workup: Urinalysis, BMP (creatinine, potassium, glucose), fasting lipids, HbA1c, CBC (hematocrit), uric acid, ECG. Echocardiography if LVH suspected. Ambulatory BP monitoring (ABPM) for white-coat or masked hypertension - strongly emphasized in AHA 2025.
Cardiovascular risk stratification: The 2025 ACC/AHA guideline now uses the PREVENT Equation (replacing the old Pooled Cohort Equations) to guide pharmacotherapy decisions.
- Washington Manual of Medical Therapeutics, p. 75-78
3. Treatment Thresholds
| Guideline | Initiate Pharmacotherapy At |
|---|---|
| ACC/AHA 2025 | Stage 1 (≥130/80) + ASCVD or 10-yr CVD risk ≥7.5% (PREVENT); Stage 2 always |
| ACC/AHA 2025 | Stage 1, low-risk (<7.5%): lifestyle 3-6 months first, then add meds if not at goal |
| ESC 2024 | ≥140/90 mmHg; 130-139/80-89 mmHg only if high CV risk, after lifestyle trial |
4. Lifestyle Modifications
Recommended for all hypertensive patients regardless of pharmacotherapy:
| Modification | Approximate SBP Reduction |
|---|---|
| Weight reduction (per 10 kg loss) | 5-20 mmHg |
| DASH diet | 8-14 mmHg |
| Sodium restriction (< 2 g/day) | 2-8 mmHg |
| Aerobic exercise | 4-9 mmHg |
| Limit alcohol (≤ 2 drinks/day men, ≤ 1/day women) | 2-4 mmHg |
| Smoking cessation | Reduces overall CV risk |
- Washington Manual of Medical Therapeutics, Table 3-3
5. Pharmacotherapy
First-Line Agents (Grade I, Level A evidence)
- Thiazide/thiazide-like diuretics (chlorthalidone preferred over HCTZ for 24-hour coverage)
- Calcium channel blockers (CCBs) - especially dihydropyridines (amlodipine)
- ACE inhibitors (ACEi)
- Angiotensin receptor blockers (ARBs)
Beta-blockers are not first-line unless a specific indication exists (HFrEF, post-MI, angina, AF, or pregnancy in younger women).
- Comprehensive Clinical Nephrology 7e, Table 37.9
Combination Strategy
The 2025 ACC/AHA guideline (like ESC 2018/2024) strongly favors starting with dual combination therapy in most patients at typical targets, because single-drug response is often limited by compensatory pressor mechanisms (e.g., RAS activation countering diuretics/CCBs).
- Stage 1, lower-risk: Single agent with titration is reasonable (Grade IIa)
- Stage 2 (BP >20/10 above target): Two agents from different classes recommended upfront (Grade I), either as separate pills or a single-pill combination (SPC)
European algorithm (ESC/ESH):
- Comprehensive Clinical Nephrology 7e, Fig. 37.3
6. Treatment Targets
| Population | Target BP |
|---|---|
| General adults (ACC/AHA 2025) | < 130/80 mmHg |
| Older/frail adults (individualized) | < 140 mmHg systolic |
| CKD with proteinuria | < 130/80 (some guidelines < 125/75) |
| Diabetes (ACC/AHA) | < 130/80 mmHg |
| Post-stroke / cognitive protection | < 130 mmHg systolic |
| ESC 2024 (age 18-64) | 120-129/70-79 mmHg |
| ESC/ESH 2024 (age 65-79) | 130-139 mmHg systolic |
| ESH 2024 (age ≥80 or frail) | 140-150 mmHg systolic |
The J-curve concern (excessive BP lowering causing harm) applies particularly at DBP < 60-65 mmHg in patients with CAD.
7. Special Populations and Compelling Indications
| Comorbidity | Preferred Agents |
|---|---|
| Diabetes | ACEi or ARB (especially if albuminuria present); SGLT2 inhibitors offer added BP-lowering + renoprotection |
| CKD with proteinuria | ACEi or ARB as first-line (renoprotective beyond BP effect) |
| Heart failure (HFrEF) | ACEi/ARB/ARNI + beta-blocker + aldosterone antagonist |
| Post-MI / stable angina | Beta-blocker + ACEi or ARB |
| Atrial fibrillation | Beta-blocker or non-DHP CCB for rate control |
| Isolated systolic hypertension (elderly) | Thiazide or long-acting DHP-CCB |
| Pregnancy | Labetalol, methyldopa, nifedipine (ACEi/ARBs are contraindicated) |
| Black patients | Thiazides and CCBs preferred (RAS blockers less effective as monotherapy) |
8. Resistant Hypertension
Defined as BP remaining above target despite ≥ 3 optimally dosed agents (including a diuretic), or requiring ≥ 4 agents to maintain control.
Steps:
- Confirm true resistance with ABPM/HBPM (exclude pseudo-resistance from poor adherence, white-coat effect, or suboptimal measurement)
- Screen for primary aldosteronism - now a Class 1 recommendation in all patients with resistant hypertension (AHA 2025, ESC 2024, Endocrine Society 2025)
- Evaluate for other secondary causes (renal artery stenosis, OSA, pheochromocytoma)
- Add spironolactone 25-50 mg/day as fourth agent (strongest evidence)
- Consider renal denervation (RDN) - newly incorporated in ACC/AHA 2025, ESC 2024, and ESH 2024 for carefully selected patients with eGFR ≥40 ml/min/1.73m² and uncontrolled BP despite optimal therapy
9. Hypertensive Emergency vs. Urgency
| Urgency | Emergency | |
|---|---|---|
| Definition | Severe BP elevation (≥ 180/100-120) without acute target organ damage | Severe BP + acute end-organ damage |
| Management | Oral antihypertensives; gradual reduction over 24-48 hours; no IV needed | IV agents (labetalol, nicardipine, nitroprusside, clevidipine); ICU admission |
| Target | Reduce by ~20-25% over first hours; normalize over days | Reduce MAP by ~25% in first hour, then gradual over 24-48 hours |
Note: The term "hypertensive urgency" has been retired in the 2025 ACC/AHA guidelines - replaced with "severe hypertension without acute target organ damage" to prevent over-treatment and unnecessary ED visits.
- Brenner and Rector's The Kidney 2-Volume Set; Harrison's Principles of Internal Medicine 22e
10. Monitoring
- Reassess BP in 1 month after pharmacotherapy initiation in high-risk patients; every 3-6 months once stable.
- Home BP monitoring (HBPM) and ABPM are more prominently recommended in AHA 2025 for better phenotyping and preventing over/under-treatment.
- Monitor potassium and creatinine after starting ACEi/ARB/diuretics.
Key Guideline Documents
| Guideline | Year | Threshold | Target |
|---|---|---|---|
| ACC/AHA 2025 | 2025 | ≥ 130/80 | < 130/80 |
| ESC 2024 | 2024 | ≥ 140/90 | 120-139 (age-dependent) |
| Hypertension Canada | 2025 | ≥ 130/80 | < 130/80 |
Note on ESC 2024 erratum: An erratum was issued (PMID: 41319970) - use the corrected version.
Sources:
- Washington Manual of Medical Therapeutics, pp. 74-78
- Comprehensive Clinical Nephrology 7e, pp. 530-531
- ACC/AHA 2025 High Blood Pressure Guideline (Circulation 2025)
- 2024 ESC Guidelines for hypertension - McEvoy JW et al., Eur Heart J. 2024 [PMID: 39210715]
- Hypertension Canada 2025 - Goupil R et al., CMAJ 2025 [PMID: 40419299]
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