Hypertension Clinical Guide Diagnosis Management Complications
medicine

Hypertension Clinical Guide Diagnosis Management Complications

Jan 4, 2026 1 min read

Hypertension (HTN) – Complete Clinical Reference

1. Definition

Hypertension is a chronic condition characterized by persistently elevated systemic arterial blood pressure (BP), increasing the risk of cardiovascular, cerebrovascular, renal, and retinal disease.

  • Office BP diagnosis:

≥140/90 mmHg on at least 2 separate visits

  • Ambulatory/Home BP equivalents:

* Daytime ABPM ≥135/85 mmHg

* Night-time ABPM ≥120/70 mmHg

* 24-hour ABPM ≥130/80 mmHg

Reference:

https://www.escardio.org/Guidelines

https://www.heart.org/en/health-topics/high-blood-pressure

2. Classification (Adults)

| Category | Systolic (mmHg) | Diastolic (mmHg) |

| ------------------- | --------------- | ---------------- |

| Normal | <120 | <80 |

| Elevated | 120–129 | <80 |

| Stage 1 HTN | 130–139 | 80–89 |

| Stage 2 HTN | ≥140 | ≥90 |

| Hypertensive Crisis | ≥180 | ≥120 |

3. Epidemiology

  • Affects >1.3 billion people worldwide
  • Major modifiable risk factor for:

* Ischemic heart disease

* Stroke

* Chronic kidney disease

  • Only ~50% of patients have adequate BP control

Reference:

https://www.who.int/news-room/fact-sheets/detail/hypertension

4. Etiology

A. Primary (Essential) Hypertension – ~90–95%

Multifactorial:

  • Genetic predisposition
  • High salt intake
  • Obesity
  • Sedentary lifestyle
  • Insulin resistance
  • Sympathetic overactivity

B. Secondary Hypertension – ~5–10%

| Cause | Key Clues |

| ------------------------- | ------------------------------------- |

| Renal parenchymal disease | Raised creatinine, abnormal urine |

| Renal artery stenosis | Abdominal bruit, ACEI creatinine rise |

| Primary aldosteronism | Hypokalemia |

| Pheochromocytoma | Episodic headache, sweating |

| Cushing syndrome | Moon face, striae |

| OSA | Snoring, daytime sleepiness |

| Coarctation of aorta | BP arm > leg |

Reference:

https://www.uptodate.com/contents/secondary-hypertension

5. Pathophysiology

  • Increased systemic vascular resistance
  • Endothelial dysfunction
  • RAAS activation → sodium retention
  • Sympathetic nervous system overactivity
  • Vascular remodeling → arterial stiffness

Leads to:

  • Left ventricular hypertrophy
  • Atherosclerosis
  • Microvascular damage

6. Clinical Features

Usually Asymptomatic (“Silent Killer”)

Symptoms (when present)

  • Headache
  • Dizziness
  • Blurred vision
  • Chest pain
  • Dyspnea
  • Palpitations

Signs of Target Organ Damage

  • LV hypertrophy
  • Retinopathy
  • Proteinuria
  • Stroke/TIA
  • Heart failure

7. Investigations

Baseline Evaluation

  • BP (both arms)
  • ECG
  • Urinalysis
  • Serum creatinine, eGFR
  • Serum electrolytes
  • Fasting glucose / HbA1c
  • Lipid profile

Additional Tests (if indicated)

  • Echocardiography (LVH)
  • Renal Doppler / CT angiography
  • Aldosterone–renin ratio
  • Plasma metanephrines
  • Sleep study (OSA)

Reference:

https://www.nice.org.uk/guidance/ng136

8. Differential Diagnosis

  • White coat hypertension
  • Masked hypertension
  • Secondary hypertension
  • Pseudohypertension (elderly)
  • Anxiety-related BP elevation

9. Management (Stepwise)

A. Non-Pharmacological (For ALL patients)

| Measure | Expected BP Reduction |

| --------------------------- | --------------------- |

| Weight loss | ↓ 5–20 mmHg |

| Salt restriction (<5 g/day) | ↓ 5–6 mmHg |

| DASH diet | ↓ 8–14 mmHg |

| Exercise | ↓ 4–9 mmHg |

| Alcohol reduction | ↓ 2–4 mmHg |

Reference:

https://www.heart.org/en/healthy-living

B. Pharmacological Therapy

First-Line Drug Classes

  • ACE inhibitors (ACEI)
  • Angiotensin receptor blockers (ARB)
  • Calcium channel blockers (CCB)
  • Thiazide / thiazide-like diuretics

1. ACE Inhibitors (e.g., Enalapril)

  • Indications: Diabetes, CKD, heart failure
  • Mechanism: Inhibits angiotensin II formation
  • Dose:

Adults: 5–40 mg/day

  • Adverse effects: Cough, hyperkalemia, angioedema
  • Contraindications: Pregnancy, bilateral renal artery stenosis
  • Monitoring: Creatinine, potassium
  • Counseling: Dry cough may occur

2. ARBs (e.g., Losartan)

  • Indications: ACEI intolerance
  • Mechanism: Blocks AT1 receptor
  • Dose: 50–100 mg/day
  • Adverse effects: Hyperkalemia
  • Contraindications: Pregnancy
  • Monitoring: Renal function

3. Calcium Channel Blockers (Amlodipine)

  • Indications: Elderly, isolated systolic HTN
  • Mechanism: Vasodilation via calcium blockade
  • Dose: 5–10 mg/day
  • Adverse effects: Pedal edema, flushing
  • Contraindications: Severe aortic stenosis

4. Thiazide Diuretics (Chlorthalidone)

  • Mechanism: Sodium excretion
  • Dose: 12.5–25 mg/day
  • Adverse effects: Hypokalemia, hyperuricemia
  • Monitoring: Electrolytes

5. Beta Blockers (Selected Use)

  • Indications: CAD, AF, heart failure
  • Avoid: Asthma, severe bradycardia

10. Hypertensive Crisis

Hypertensive Emergency

  • Severe BP + acute target organ damage
  • Examples: Stroke, pulmonary edema, aortic dissection

Management

  • ICU
  • IV drugs (nitroprusside, labetalol, nitroglycerin)
  • Reduce MAP by 20–25% in first hour

Hypertensive Urgency

  • Severe BP without organ damage
  • Oral drugs, gradual reduction

Reference:

https://www.acc.org/latest-in-cardiology

11. Special Situations

| Condition | Preferred Drugs |

| ----------------- | --------------------- |

| Pregnancy | Labetalol, Methyldopa |

| CKD + Proteinuria | ACEI / ARB |

| Diabetes | ACEI / ARB |

| Elderly | CCB, thiazide |

| BPH | Alpha blockers |

12. Complications

  • Stroke
  • Myocardial infarction
  • Heart failure
  • Chronic kidney disease
  • Hypertensive retinopathy
  • Aortic dissection

13. Target BP Goals

| Population | Target BP |

| -------------- | ------------ |

| General | <140/90 mmHg |

| Diabetes / CKD | <130/80 mmHg |

| Elderly (>65) | SBP 130–139 |

14. Patient Counseling Points

  • Adherence is lifelong
  • Home BP monitoring
  • Avoid NSAIDs
  • Lifestyle changes are mandatory
  • Do not stop drugs abruptly

15. Key Authoritative External Resources

⚡ Interactive MCQ Quiz

Frequently Asked Questions

Hypertension is a chronic medical condition characterized by persistently elevated arterial blood pressure, usually defined as systolic BP ≥140 mmHg and/or diastolic BP ≥90 mmHg on repeated measurements.
Hypertension is classified into primary (essential) hypertension, which has no identifiable cause, and secondary hypertension, which results from an underlying condition such as renal, endocrine, or vascular disease.
Hypertensive urgency involves severe BP elevation without acute target organ damage, while hypertensive emergency includes severe hypertension with evidence of acute organ damage such as stroke, pulmonary edema, or acute kidney injury.
Most patients are asymptomatic. When present, symptoms may include headache, dizziness, palpitations, blurred vision, chest pain, or shortness of breath, especially in severe hypertension.
Resistant hypertension is blood pressure that remains above target despite the use of three antihypertensive drugs of different classes, including a diuretic, at optimal doses.
Common causes include chronic kidney disease, renal artery stenosis, primary hyperaldosteronism, pheochromocytoma, Cushing syndrome, obstructive sleep apnea, and coarctation of the aorta.
ACE inhibitors reduce intraglomerular pressure, decrease proteinuria, and slow the progression of diabetic nephropathy while effectively controlling blood pressure.
Isolated systolic hypertension is defined as elevated systolic BP (≥140 mmHg) with normal diastolic BP (<90 mmHg), commonly seen in elderly patients due to arterial stiffness.
Lifestyle measures include salt restriction, weight loss, regular physical activity, DASH diet, reduced alcohol intake, smoking cessation, and stress management.
White coat hypertension refers to elevated blood pressure readings in a clinical setting with normal readings outside the clinic, usually confirmed by ambulatory or home BP monitoring.
Masked hypertension occurs when office BP readings are normal but ambulatory or home BP measurements are consistently elevated, carrying a high cardiovascular risk.
Target organ damage includes left ventricular hypertrophy, heart failure, coronary artery disease, stroke, chronic kidney disease, hypertensive retinopathy, and peripheral arterial disease.
ACE inhibitors, angiotensin receptor blockers, and direct renin inhibitors are contraindicated in pregnancy due to risk of fetal toxicity.
Ambulatory BP monitoring helps diagnose white coat and masked hypertension, assess BP variability, and predict cardiovascular risk more accurately than office readings.
Abrupt discontinuation of clonidine can cause rebound hypertension due to sudden sympathetic overactivity, which may be severe and life-threatening.
Related Topics
hypertension diagnosis and management hypertension clinical guidelines for doctors stepwise treatment of hypertension causes of secondary hypertension hypertensive emergency management protocol resistant hypertension evaluation and treatment antihypertensive drugs mechanism and side effects blood pressure targets in diabetes and ckd hypertension in pregnancy management isolated systolic hypertension in elderly workup of secondary hypertension complications of uncontrolled hypertension raas system in hypertension lifestyle modification for hypertension control best drugs for hypertension with comorbidities hypertension high blood pressure systemic hypertension essential hypertension secondary hypertension hypertensive emergency hypertensive urgency blood pressure management antihypertensive drugs ace inhibitors arbs calcium channel blockers thiazide diuretics resistant hypertension malignant hypertension isolated systolic hypertension hypertension complications target organ damage blood pressure guidelines
More in medicine
Congestive Heart Failure Comprehensive Guide Diagnosis Classification and Management
Congestive Heart Failure Comprehensive Guide Diagnosis Classification and Management
medicine
Hyperthyroidism Clinical Guide Diagnosis Causes Symptoms Treatment
Hyperthyroidism Clinical Guide Diagnosis Causes Symptoms Treatment
medicine
High Altitude Pulmonary Edema and Hypothermia Clinical Features Diagnosis and Management
High Altitude Pulmonary Edema and Hypothermia Clinical Features Diagnosis and Management
medicine
Hyperaldosteronism Clinical Features Diagnosis and Management Guide
Hyperaldosteronism Clinical Features Diagnosis and Management Guide
medicine
Ischemic Heart Disease Comprehensive Clinical Guide Diagnosis Management and Prevention
Ischemic Heart Disease Comprehensive Clinical Guide Diagnosis Management and Prevention
medicine
Diseases of the Pericardium Clinical Guide Acute Pericarditis Cardiac Tamponade
Diseases of the Pericardium Clinical Guide Acute Pericarditis Cardiac Tamponade
medicine
Browse Specialties
Related Articles
Congestive Heart Failure Comprehensive Guide Diagnosis Classification and Management
medicine
Hyperthyroidism Clinical Guide Diagnosis Causes Symptoms Treatment
medicine
High Altitude Pulmonary Edema and Hypothermia Clinical Features Diagnosis and Management
medicine
Hyperaldosteronism Clinical Features Diagnosis and Management Guide
medicine
Popular Tags
first heart sound S1 ADHD in children complications of third stage of labour third stage of labour complications postpartum hemorrhage causes retained placenta management uterine inversion obstetrics placenta accreta spectrum active management of third stage of labour PPH prevention obstetric emergencies third stage embryology head and neck blood supply of upper limb upper limb anatomy mitral regurgitation valvular heart disease percutaneous coronary intervention pci procedure coronary angioplasty pci indications