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Comprehensive Nursing Management of Hypertension in Adult Patients

Detailed overview of hypertension including pathophysiology, classification, risk factors, clinical presentation, diagnosis, and nursing management strategies for adult patients.

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ADULT HEALTH NURSING (NUR 232) LEVEL II HIGHER DIPLOMA IN GENERAL NURSING • UNITVI • Nursing Management Of Clients With Alterations In Cardio-vascular Function. HYPERTENSION Lesole. Isaac,
INTRODUCTION • "Hypertension is the leading preventable cause of cardiovascular disease worldwide.“ • Otherwise known as “THE SILENT KILLER” • Usually produces no symptoms • Most people are unaware they have it • Many patients with hypertension feel "fine" despite elevated readings
GENERAL OBJECTIVE By the end of this session, students will be able to understand the comprehensive concepts of hypertension in adult patients, including its pathophysiology, clinical presentation, diagnostic criteria, and evidence-based management strategies, in order to apply this knowledge effectively in nursing practice.
LEARNING OBJECTIVES By the end of this session, students will be able to: Review the anatomy and physiology of the cardiovascular system Define hypertension and understand its classification Identify the etiology, risk factors, and causes of hypertension Explain the pathophysiology of hypertension Recognize clinical manifestations and complications Describe diagnostic approaches and management strategies Apply nursing interventions for patients with hypertension
REVIEW OF ANATOMY AND PHYSIOLOGY -THE HEART • The Heart:The Body's Pump • Located within the thoracic cavity, medially between the lungs in the mediastinum • Approximately the size of a fist: 12 cm in length, 8 cm wide, and 6 cm in thickness • Consists of four chambers: • Right atrium and left atrium (receiving chambers) • Right ventricle and left ventricle (pumping chambers) • The heart contracts approximately 108,000 times per day • Weight: female heart approx. of 250-300g; male heart approx. of 300-350g
REVIEW OF ANATOMY AND PHYSIOLOGY - CIRCULATION Pulmonary and Systemic Circuits • Pulmonary Circuit: • Right ventricle pulmonary arteries lungs (gas exchange) pulmonary veins left → → → → atrium Systemic Circuit: • Left ventricle aorta body tissues superior/inferior vena cava right atrium → → → →
REVIEW OF ANATOMY AND PHYSIOLOGY - BLOOD PRESSURE Understanding Blood Pressure Definition: • Blood pressure is the force exerted by circulating blood on the walls of the arteries Two Components:  Systolic BP (SBP): Maximum pressure when the heart contracts and pumps blood  Diastolic BP (DBP): Minimum pressure when the heart relaxes and fills with blood Measurement:  Expressed in millimeters of mercury (mmHg)  Normal resting BP: 100-140 mmHg systolic and 60-90 mmHg diastolic
DEFINITION OF HYPERTENSION • Hypertension (HTN) is a chronic medical condition characterized by persistently elevated arterial blood pressure. According to the 2024 European Society of Cardiology (ESC) Guidelines: "Hypertension is defined as systolic blood pressure of ≥140 mmHg and/or a diastolic blood pressure of ≥90 mmHg, confirmed by repeated measurements.”
ETIOLOGY OF HYPERTENSION Primary (Essential) Hypertension (90-95% of cases) : • No identifiable cause Results from complex interaction of genetic and environmental factors Develops gradually over many years Secondary Hypertension (5-10% of cases) : • Has an identifiable underlying cause Often results from another systemic disease, usually nephrological or endocrine
SPECIFIC CAUSES - PRIMARY HYPERTENSION Causes and Contributing Factors in Primary Hypertension Lifestyle Factors: High salt intake High saturated fat intake Physical inactivity/sedentary lifestyle Heavy alcohol consumption Smoking
SPECIFIC CAUSES - PRIMARY HYPERTENSION Metabolic Factors: Obesity Insulin resistance (common in obesity and metabolic syndrome) Other Factors: Stress and emotional factors Low birth weight and early-life factors
SPECIFIC CAUSES - SECONDARY HYPERTENSION Identifiable Causes of Secondary Hypertension Renal Causes (most common): Chronic kidney disease Renal artery stenosis Glomerulonephritis Renal vascular obstruction
SPECIFIC CAUSES - SECONDARY HYPERTENSION • Endocrine Causes: • Primary aldosteronism (Conn's syndrome) • Pheochromocytoma • Cushing's syndrome • Hyperthyroidism/Hypothyroidism • Acromegaly
SPECIFIC CAUSES - SECONDARY HYPERTENSION Other Causes: • Obstructive sleep apnea • Coarctation of the aorta • Pregnancy (gestational hypertension) • Certain medications (NSAIDs, oral contraceptives, corticosteroids)
PREDISPOSING FACTORS (RISK FACTORS) Risk Factor Description Age BP rises with advancing age; prevalence increases in older adults Gender Men have higher prevalence up to age 65; women have higher BP between 65-74 years Ethnicity Black African/African-Caribbean origin have higher risk Genetics Positive family history increases risk Co-morbidities Co-existing diabetes or kidney disease Non-Modifiable Risk Factors
PREDISPOSING FACTORS (RISK FACTORS) - CONTINUED Risk Factor Impact Smoking Directly contributes to atherosclerosis and hypertension Excess dietary sodium Raises BP in salt-sensitive individuals Unhealthy diet High saturated fat, low potassium intake Obesity Increases cardiovascular risk Physical inactivity Sedentary lifestyle increases risk Excess alcohol Heavy drinking increases BP Stress Anxiety and emotional stress raise BP due to increased adrenaline and cortisol Modifiable Risk Factors
INCIDENCE AND PREVALENCE Global Burden: • Affects approximately 1 in 3 adults aged 30-79 years worldwide • Approximately 1.28 billion adults aged 30 to 79 years worldwide are living with hypertension. • Contributes to over 10 million deaths annually worldwide • The prevalence of hypertension rises markedly with age. In many countries, more than 50% of adults aged 60 years and older have hypertension. Prevalence is also increasing in sub Saharan Africa because of population ageing, urbanisation, unhealthy dietary patterns, obesity, and reduced physical activity
INCIDENCE AND PREVALENCE Epidemiological measure Current estimate Adults living with hypertension worldwide Approximately 1.28 billion Age group most affected 30 to 79 years Proportion in low and middle income countries About 66% Adults unaware of their hypertension Approximately 46% Adults receiving treatment Approximately 42% Adults with controlled hypertension Approximately 21% Global Epidemiological Summary
CLASSIFICATION OF BP IN ADULTS – BY BP LEVEL 2017 ACC/AHA
CLASSIFICATION OF BP IN ADULTS – BY CAUSE By Cause: • Primary (Essential) - 90-95% of cases • Secondary - 5-10% of case
CLASSIFICATION BY CLINICAL PRESENTATION • White Coat Hypertension • Elevated blood pressure measured in the clinic but normal blood pressure at home or on ambulatory monitoring. • Masked Hypertension • Normal blood pressure in the clinic but elevated blood pressure outside the healthcare setting. • Sustained Hypertension • Persistently elevated blood pressure in both clinical and out of office measurements.
CLASSIFICATION BY CLINICAL PRESENTATION Resistant Hypertension Blood pressure remains above target despite treatment with three antihypertensive medications of different classes, including a diuretic, at optimal doses. Refractory Hypertension Blood pressure remains uncontrolled despite treatment with five or more antihypertensive agents, including a long acting thiazide type diuretic (indapamide) and a mineralocorticoid receptor antagonist like Spironolactone
CLASSIFICATION BY SEVERITY A hypertensive crisis is a sudden, severe spike in blood pressure typically ≥ 180/120 mm Hg. It is divided into two main categories depending on whether the high blood pressure has caused acute damage to your body’s vital organs 1. HYPERTENSIVE URGENCY • Blood pressure usually ≥180/120 mmHg No evidence of acute target organ damage Requires prompt blood pressure reduction over hours 1. HYPERTENSIVE CRISIS
CLASSIFICATION BY SEVERITY 11. HYPERTENSIVE EMERGENCY Blood pressure usually ≥180/120 mmHg Evidence of acute target organ damage, such as: Acute stroke ,Acute heart failure , Myocardial infarction ,Acute kidney injury ,Aortic dissection , Hypertensive encephalopathy, Retinal haemorrhage or papilloedema • Malignant Hypertension:A distinct clinical subset of a hypertensive emergency distinguished by severe systemic microvascular injury (fibrinoid necrosis) and hallmark retinal hemorrhages, exudates, or swelling of the optic nerve (papilledema).
Classification Types By blood pressure level Normal, Elevated, Grade 1, Grade 2, By cause Primary (Essential), Secondary By clinical presentation White coat, Masked, Sustained, Resistant, Refractory By severity Hypertensive urgency, Hypertensive emergency SUMMARY OF CLASSIFICATIONS
PATHOPHYSIOLOGY • 1. Risk factors (Age, obesity, high salt intake, stress, diabetes, smoking etc ) • 2. Overactivation of the Sympathetic Nervous System (SNS) • In many patients with hypertension, the sympathetic nervous system becomes chronically overactive.This causes : Stimulation of renin release from the kidneys, Peripheral vasoconstriction, Increased cardiac output …The sustained vasoconstriction increases systemic vascular resistance, leading to persistent hypertension.
PATHOPHYSIOLOGY 3. Activation of the Renin Angiotensin Aldosterone System (RAAS) Reduced renal perfusion or increased sympathetic stimulation triggers the release of renin from the juxtaglomerular cells of the kidneys. The Step by Step RAAS Cascade: • Renin converts angiotensinogen into angiotensin I. • Angiotensin converting enzyme (ACE), converts angiotensin I into angiotensin II. • Angiotensin II is a potent vasoconstrictor and stimulates aldosterone secretion from the adrenal cortex. • Aldosterone promotes sodium and water reabsorption in the kidneys The result is: Increased blood volume, Increased cardiac output, Increased systemic vascular resistance and Persistent elevation of blood pressure
PATHOPHYSIOLOGY 4. Renal Sodium andWater Retention The kidneys regulate blood pressure by controlling sodium and water balance. • When sodium excretion is impaired: Sodium accumulates in the body, water follows sodium by osmosis, blood volume increases, cardiac output rises and blood pressure increases. Chronic volume expansion contributes significantly to sustained hypertension.
PATHOPHYSIOLOGY 5. Endothelial Dysfunction The vascular endothelium normally produces substances that regulate vascular tone. Vasodilator (Nitric oxide) & Vasoconstrictor (Endothelin). In hypertension: • Nitric oxide production decreases. • Endothelin production increases. Arteries remain chronically constricted. This increases systemic vascular resistance.
PATHOPHYSIOLOGY 6.Vascular Remodelling • Persistent high blood pressure damages arterial walls. Structural changes include: • Smooth muscle hypertrophy • Thickening of arterial walls • Reduced arterial elasticity • Narrowing of the vascular lumen  These changes further increase peripheral resistance and perpetuate hypertension.
PATHOPHYSIOLOGY 7.Target Organ Damage (These are also complications) Persistent hypertension damages several organs because of prolonged exposure to elevated arterial pressure. • Heart (Left ventricular hypertrophy, Coronary artery disease, Heart failure, Myocardial infarction) • Brain (Stroke ,Transient ischaemic attack, Hypertensive encephalopathy, Cognitive impairment) • Kidneys (Chronic kidney disease, Hypertensive nephrosclerosis, Progressive renal failure)
PATHOPHYSIOLOGY 7.Target Organ Damage ( These are also complications) • Eyes (Hypertensive retinopathy, Retinal haemorrhage, Papilloedema in severe hypertension ,Visual impairment or blindness) • BloodVessels (Atherosclerosis, Peripheral arterial disease,Aortic aneurysm ,Aortic dissection)
CLINICAL MANIFESTATION • Often Asymptomatic: • Most people with hypertension experience no symptoms • Blood pressure can be dangerously high without any warning signs • May be discovered during routine health screening • When Symptoms Occur,They May Include: , Blurred vision, dizziness, ear noise or buzzing, irregular heartbeat, nocturia (frequent urination at night), nosebleed
COMPLICATIONS • Target Organ Damage • REFERTO PATHOPHYSIOLOGY SLIDES POINT # 7
DIAGNOSIS - HISTORY HistoryTaking in Hypertension Key History Components: Personal History: • Known chronic diseases (diabetes, CKD, CVD) • Current medications (including OTC, herbal and traditional meds) • Lifestyle factors (diet, exercise, smoking, alcohol) Family History: ( Hypertension, Cardiovascular disease, Stroke, Renal disease)
DIAGNOSIS - PHYSICAL EXAMINATION PHYSICAL EXAMINATION FOR HYPERTENSION • Vital Signs: • Accurate BP measurement in both arms. • Heart rate and rhythm assessment
DIAGNOSIS - PHYSICAL EXAMINATION • Physical Examination for Hypertension • Cardiovascular: • Palpate pulses • Check for arrhythmias, especially atrial fibrillation • Assess for signs of heart failure • Abdominal: • Check for masses
DIAGNOSIS - INVESTIGATIONS Investigation Details of the test Blood tests HbA1c, electrolytes, creatinine, eGFR Lipid profile Total cholesterol and HDL cholesterol Urinalysis Proteinuria, haematuria ECG (12-lead) Detect arrhythmias and left ventricular hypertrophy Fundoscopy Check for hypertensive retinopathy Recommended Investigations
DIAGNOSIS - INVESTIGATIONS Additional test include • FBC • Thyroid Function Test • Cortisol levels IMAGING – Abdominal ultrasound, KUB ultrasound, chest xray.
PROGNOSIS Hypertension is a highly treatable condition With EffectiveTreatment: Significant reduction in cardiovascular events Improved life expectancy Reduced risk of stroke (40%), heart failure (50%), MI (25%) Prevention of target organ damage progression WithoutTreatment: Progressive target organ damage Increased morbidity and mortality Shortened life expectancy
MANAGEMENT Non-Pharmacological Management Intervention Recommendation Weight loss Aim for BMI 20-25 kg/m² Dietary changes DASH diet: fruits, vegetables, whole grains, low-fats Salt reduction <6g/day (optimal <1,500mg/day) Physical activity 30 minutes moderate exercise on 5-7 days/week Alcohol reduction Smoking cessation Stress management Reduce anxiety and emotional stress
MANAGEMENT - PHARMACOLOGICALTREATMENT Management - PharmacologicalTreatment Step 1Treatment - Initiation Who toTreat: • All adults with persistent stage 2 hypertension (BP ≥160/100 mmHg) • Stage 1 hypertension with risk factors (CVD, target organ damage, diabetes, or CVD risk ≥10%) First-line Agents: • ACE (Angiotensin-Converting Enzyme ) Inhibitors/ARBs ( Angiotensin II Receptor Blockers ) • Preferred for: • People with type 2 diabetes • People aged <55 years • People with CKD
MANAGEMENT - PHARMACOLOGICAL TREATMENT • Calcium Channel Blockers (CCBs): • Preferred for: • People aged ≥55 years • People of Black African/African-Caribbean origin • Thiazide-like Diuretics: • Alternative if CCB not tolerated • Indapamide preferred over conventional thiazides
MANAGEMENT - PHARMACOLOGICALTREATMENT Stepwise Approach to DrugTreatment Step 2 (If BP not controlled on monotherapy): • Add drug from a different class • Example:ACEi/ARB + CCB or ACEi/ARB + thiazide-like diuretic Step 3 (If BP not controlled on 2 drugs): • Triple therapy:ACEi/ARB + CCB + thiazide-like diuretic
MANAGEMENT - PHARMACOLOGICAL TREATMENT • Step 4 (Resistant Hypertension): • BP not controlled on optimal doses of 3 drugs • Add spironolactone (if K+ ≤4.5 mmol/L) • Or alpha-blocker/beta-blocker
NURSING MANAGEMENT - ASSESSMENT Nursing Assessment of Hypertensive Patient • Initial Assessment: • Obtain accurate BP measurements • Assess for signs of target organ damage • Complete health history including risk factors • Evaluate current symptoms or complications
NURSING MANAGEMENT Ongoing Monitoring: • Vital signs at each visit • Weight and BMI monitoring • Adherence to medication regimen • Review of lifestyle modifications
NURSING MANAGEMENT Health Education Assessment: • Patient's understanding of the condition • Knowledge of treatment plan • Awareness of complications • Compliance with monitoring recommendations
NURSING CARE PLAN FOR A PATIENT WITH HYPERTENSION • PROBLEM 1 • Subjective: Patient complains of severe headache, dizziness, blurred vision or chest discomfort. Objective: BP 180/120 mmHg or above, tachycardia, altered neurological status, evidence of target organ damage. • NURSING DIAGNOSIS : Ineffective Tissue Perfusion (Cerebral, Renal and Cardiac) related to severely elevated systemic vascular resistance secondary to hypertensive crisis as evidenced by BP ≥180/120 mmHg, headache, visual disturbances and altered neurological findings.
NURSING CARE PLAN FOR A PATIENT WITH HYPERTENSION INTERVENTIONS Monitor blood pressure every 5 to 15 minutes during the acute phase. Assess neurological status using Glasgow Coma Scale Monitor urine output hourly. Administer prescribed intravenous antihypertensives (e.g. labetalol). Administer oxygen if indicated. Prepare the patient for admission to a high dependency or intensive care unit if necessary.
NURSING CARE PLAN FOR A PATIENT WITH HYPERTENSION • Problem 2 Subjective: Patient complains of fatigue and decreased activity tolerance. Objective: BP above 140/90 mmHg • NURSING DIAGNOSIS : Decreased Cardiac Output related to increased systemic vascular resistance and impaired myocardial contractility secondary to uncontrolled hypertension as evidenced by persistent blood pressure ≥140/90 mmHg, tachycardia, dyspnoea on exertion, fatigue, diminished peripheral pulses, delayed capillary refill, and decreased activity tolerance.
NURSING CARE PLAN FOR A PATIENT WITH HYPERTENSION • Administer antihypertensive medications as prescribed, ensuring they are given at the correct time and dose • Assess for side effects and therapeutic effectiveness of medications. • Monitor and document BP at prescribed intervals • Monitor for signs of cardiac decompensation ( headache, shortness of breath) during activity. • Encourage periods of rest to reduce cardiac workload.
NURSING CARE PLAN FOR A PATIENT WITH HYPERTENSION Problem 3 • Patient consumes a high salt diet, is overweight, physically inactive and smokes cigarettes. Blood pressure remains elevated despite medication. • Nursing Diagnosis: Ineffective Health Maintenance related to unhealthy lifestyle behaviours as evidenced by excessive sodium intake, sedentary lifestyle, obesity and smoking.
REFERENCES • Colantonio, L.D., Booth, J.N., Bress,A.P.,Whelton, P.K., Shimbo, D., Levitan, E.B., Howard, G., Safford, M.M. and Muntner, P., 2018. 2017 ACC/AHA blood pressure treatment guideline recommendations and cardiovascular risk. Journal of the American College of Cardiology, 72(11), pp.1187-1197. • Hinkle, J.L. and Cheever, K.H. (2022) Brunner & Suddarth'sTextbook of Medical-Surgical Nursing. 15th edn. Philadelphia:Wolters Kluwer. • McEvoy, J.W., McCarthy, C.P., Bruno, R.M. et al. (2024) 2024 ESC Guidelines for the management of elevated blood pressure and hypertension. European Heart Journal.Available at: https://www.escardio.org/Guidelines/Clinical-Practice-Guidelines/Elevated-Blood-Pressure-and-Hypertension • NANDA International (2024) NANDA International Nursing Diagnoses: Definitions and Classification 2024–2026. 13th edn. New York:Thieme. • Whelton, P.K., Carey, R.M.,Aronow,W.S. et al. (2018) 2017 ACC/AHA Guideline for the Prevention, Detection, Evaluation, and Management of High Blood Pressure in Adults. Hypertension, 71(6), pp. e13 to e115. https://doi.org/10.1161/HYP.0000000000000065 • World Health Organization (2025) Hypertension.Available at: https://www.who.int/news-room/fact-sheets/detail/hypertension