HTN and HLD

Hypertension

Definition and Classification

• Hypertension: Persistent elevation of Systolic Blood Pressure (SBP) ≥ 130 mmHg or Diastolic Blood Pressure (DBP) ≥ 80 mmHg.

• Classification:
    - Primary (Essential) Hypertension: No identifiable cause; accounts for the majority of cases.
    - Secondary Hypertension: Due to an underlying cause, such as kidney disease, endocrine disorders, or medication side effects.

• Blood Pressure Stages:
    - Normal: SBP < 120 mmHg and DBP < 80 mmHg.   - Elevated: SBP 120-129 mmHg and DBP < 80 mmHg.   - Stage 1 Hypertension: SBP 130-139 mmHg or DBP 80-89 mmHg.   - Stage 2 Hypertension: SBP ≥ 140 mmHg or DBP ≥ 90 mmHg.   - Hypertensive Crisis: SBP > 180 mmHg and/or DBP > 120 mmHg (requires immediate consultation with a doctor).

Blood Pressure Categories

• Systolic (mm Hg) vs. Diastolic (mm Hg)
    - Normal: Less than 120 and less than 80.
    - Elevated: 120-129 and less than 80.
    - High Blood Pressure (Hypertension) Stage 1: 130-139 or 80-89.
    - High Blood Pressure (Hypertension) Stage 2: 140 or higher or 90 or higher.
    - Hypertensive Crisis: Higher than 180 and/or higher than 120.

Pathophysiology

• Blood Pressure Equation: $BP = CO imes SVR$
    - CO: Cardiac Output
    - SVR: Systemic Vascular Resistance

• Influencing Factors:
    - Genetic Factors: Family history and genetic predispositions.
    - Environmental Factors: Diet, physical activity, and lifestyle choices.

• Key Systems Involved:
    - Sympathetic Nervous System (SNS): Alters vascular resistance and heart rate.
    - Renin-Angiotensin-Aldosterone System (RAAS): Regulates blood pressure and fluid balance.
    - Endothelial Function: Impacts vascular tone and permeability.

Risk Factors

• Non-Modifiable Factors:
    - Age
    - Gender
    - Race
    - Family history

• Modifiable Factors:
    - Diet (high sodium, low potassium)
    - Physical inactivity
    - Alcohol consumption
    - Smoking
    - Obesity

• Other Contributing Factors:
    - Psychological stress
    - Socioeconomic status

Nursing Assessment of Hypertension

• Hypertension is often referred to as a silent killer because individuals may present without noticeable symptoms.

• Common Symptoms:
    - Headache
    - Blurry vision
    - Chest pain
    - Nosebleeds
    - Tinnitus (ringing in ears)
    - Dizziness

Diagnostic Studies

• Accurate Blood Pressure Measurement: Average of ≥ 2 readings on ≥ 2 visits.

• Additional Diagnostics: Physicians may anticipate various laboratory tests to ascertain underlying conditions.

Blood Pressure Measurement: Back to the Basics

• Preparation and Procedure:
    - Patient should rest for 5 minutes before measurement.
    - Wait 1 minute between consecutive readings.
    - Avoid crossing legs during measurement.
    - If measurements from both arms differ, use the higher reading for accuracy.
    - Cuff width should be approximately 40% of the arm's circumference.
    - Support the arm at heart level during the reading.
    - Do not measure blood pressure over clothing.
    - If readings are excessively high or low in one arm, switch arms if possible.

Complications of Hypertension

• Cardiac System:
    - Congestive heart failure due to the heart muscle being overworked and enlarged.

• Brain:
    - Risk of stroke; increased pressure can weaken blood vessels, leading to clots or ruptures.

• Kidneys:
    - Renal failure; hypertension can narrow the kidneys' arteries, hindering proper perfusion.

• Eyes:
    - Visual changes due to damage to retinal blood vessels, such as blurred vision or inability to focus.

• Urogenital:
    - Erectile dysfunction due to compromised blood supply.

Specific Complications

• Eye:
    - Arteriovenous nicking.
    - Narrowing of retinal arterioles.
    - Hemorrhages or exudates.
    - Papilledema.

• Brain:
    - Stroke.
    - Transient ischemic attack (TIA).

• Heart:
    - Coronary Artery Disease (CAD).
    - Heart failure (left ventricular hypertrophy).

• Kidney:
    - Microalbuminuria.
    - Proteinuria.
    - Serum creatinine ≥ 1.5 mg/dL.

• Abdominal Complications:
    - Aortic aneurysm.
    - Aortic dissection.

• Peripheral Vascular:
    - Intermittent claudication.
    - Faint or absent peripheral pulses.

Lifestyle Modifications

• Prominent Recommendations:
    - Weight loss
    - Adopt the DASH diet (Dietary Approaches to Stop Hypertension)
    - Sodium restriction
    - Moderation of alcohol consumption
    - Regular physical activity
    - Smoking cessation

Drug Therapy Overview

• First-line Treatment Options:
    - Thiazide diuretics
    - Angiotensin-Converting Enzyme Inhibitors (ACE inhibitors)
    - Angiotensin II Receptor Blockers (ARBs)
    - Calcium Channel Blockers (CCBs)

• Considerations:
    - Take patient comorbidities into account when selecting drug therapy.
    - Continuously monitor for side effects and assess patient adherence to the treatment plan.
    - Patients may experience orthostatic hypotension as a side effect of some antihypertensive medications.

Hypertensive Crisis

• Classification:
    - Urgency: No acute target organ damage; often treated with oral medications.
    - Emergency: Organ damage present; requires intravenous (IV) antihypertensive treatment.

• Goal of Treatment: Gradual reduction of blood pressure to minimize risk of complications.

Patient Education

• Essential Topics for Patients:
    - Self-monitoring and consistent adherence to medication regimens.
    - Understanding potential side effects of prescribed medications.
    - Importance of lifelong management of hypertension for overall health.

Nursing Interventions for Hypertension

• Assessment:
    - Measure blood pressure in both arms after ensuring the patient has been at rest for 5 minutes and has not consumed tobacco to avoid vasoconstriction.

• Evaluation:
    - Assess blood pressure readings, dietary habits, and body mass index (BMI).

• Education:
    - Provide guidance on the DASH diet.
    - Advise limits on sodium, alcohol, and caffeine intake.
    - Encourage smoking cessation due to its vasoconstrictive properties.
    - Promote initiation of a structured exercise program aimed at weight loss.
    - Stress adherence to medication regimens, particularly highlighting that good BP readings do not mean the patient can stop taking medication.
    - Recommend regular blood pressure monitoring and keeping records for follow-up visits.

Hyperlipidemia Overview

• Definition: Elevated levels of lipids (cholesterol and triglycerides) in the blood.

• Significance: Major risk factor for atherosclerosis and cardiovascular disease; often coexists with hypertension.

Pathophysiology of Hyperlipidemia

• Types of Cholesterol:
    - LDL (Low-Density Lipoprotein): Referred to as 'bad' cholesterol; contributes to plaque buildup in arteries.
    - HDL (High-Density Lipoprotein): Known as 'good' cholesterol; helps in the removal of LDL from the bloodstream.

• Role of Triglycerides: Elevated triglyceride levels also elevate cardiovascular risk.

Risk Factors for Hyperlipidemia

• Genetic predispositions.

• Diet rich in saturated fats and cholesterol.

• Obesity and sedentary lifestyle.

• Smoking and diabetes.

Treatment of Hyperlipidemia

• Lifestyle Modifications:
    - Adopt a diet low in saturated fats.
    - Engage in regular exercise.
    - Aim for weight loss if needed.

• Drug Therapy Options:
    - Statins
    - Ezetimibe
    - PCSK9 inhibitors

• Treatment Goals:
    - Lower LDL levels.
    - Raise HDL levels.
    - Reduce triglyceride concentrations.

Nursing Responsibilities: Hyperlipidemia

• Monitoring:
    - Assess lipid levels and evaluate cardiovascular risk.

• Safety Checks:
    - Monitor patients for side effects associated with medications (e.g., statins can cause myopathy and elevate liver enzyme levels).

• Education:
    - Provide counseling related to dietary choices and exercise.
    - Ensure patient adherence to therapy.
    - Highlight the importance of routine lipid screening.

Conclusion

• Hypertension and hyperlipidemia are prevalent but manageable conditions.

• Early intervention and proper management can prevent complications.

• Nurses have a pivotal role in patient education and ongoing monitoring of these conditions.

Ask Me 3

• To communicate effectively with newly diagnosed patients with hypertension:
    - What is my main problem?: Explain how hypertension impacts their health.
    - What do I need to do?: Outline necessary lifestyle changes and medical treatments.
    - Why is it important for me to do these things?: Emphasize the health risks associated with uncontrolled hypertension and the benefits of compliance to treatment.