hypertension

Hypertension Overview

  • Definition of Hypertension:

    • What is Hypertension?
    • According to the 2018 American Heart Association (AHA) guidelines:
      • Blood Pressure (BP) of ≥ 130/80 mmHg is considered elevated.
      • Stage I Hypertension: 130/80 mmHg to 139/89 mmHg.
      • Stage II Hypertension: 140/90 mmHg or higher.
    • Resources: Visit targetbp.org for new guidelines and clinical resources.

  • Consequences of Hypertension:

    • It is a major health problem with a direct relationship between hypertension and cardiovascular disease (CVD).
    • Hypertension increases the risk of:
      • Myocardial Infarction (MI)
      • Cerebrovascular Accident (CVA)
      • Renal Disease
    • Prevalence increases with:
    1. Age (higher in older adults)
    2. Ethnicity (particularly prevalent among African-Americans)

Statistics on Hypertension

  • Prevalence:

    • Approximately 1 out of every 2 adults in the U.S. is affected by hypertension (119 million people) as per CDC 2024 report.
    • 3 out of 4 adults do not have their hypertension under control (defined as having BP less than 130/80 mmHg).
    • African-Americans have higher rates of hypertension and develop it earlier in life.

  • Economic Impact:

    • Direct medical costs associated with hypertension exceed $79 billion annually (CDC, 2024).
    • Leading cause of death in Kentucky: Heart disease (CDC, 2022).

Epidemiological Data

  • Hypertension Prevalence (2018-2020):
    • Data categorized by adults aged 18 and older by county, with age-adjusted prevalence percentages:
    • Northern Territories:
      • Guam: 19.9%
      • Alaska: 32.5%
      • Varying percentages for other geographical locations, with a noted high of 58.7% in some regions.
    • For specifics, refer to CDC maps and statistical methodologies available online at www.cdc.gov/dhdsp/maps/atlas/statistical-methods.

Risk Factors for Primary Hypertension

  • Lifestyle Factors:

    • High alcohol consumption
    • Tobacco use
    • High cholesterol and sodium intake
    • Obesity
    • Sedentary lifestyle

  • Medical Conditions:

    • Diabetes Mellitus
    • Stress
    • Poor access to healthy food

  • Demographic Factors:

    • Age
    • Socioeconomic status
    • Educational background
    • Ethnicity

Signs and Symptoms of Hypertension

  • Hypertension is often referred to as the "Silent Killer" due to its sometimes asymptomatic nature.
  • Symptoms and signs that can arise as a result of hypertension include:
    • Fatigue
    • Dizziness
    • Palpitations
    • Angina that indicates poor perfusion
    • Dyspnea (shortness of breath)

Clinical Case Discussion: Patient Management

  • Scenario:
    • Patient admitted with uncontrolled hypertension suddenly develops anxiety and disorientation while trying to get out of bed.
    • Nurse observes a new right-sided facial droop.
  • Immediate Actions:
    1. Get the patient back into bed.
    2. Check blood pressure first to assess current status.
    3. Concern for stroke; notify the healthcare provider immediately.

White Coat Hypertension

  • Defined as a condition where a patient shows elevated blood pressure in a clinical setting but has normal readings elsewhere.
  • Ambulatory BP Monitoring:
    • Recommended 12-24-hour monitoring using a BP cuff connected to a portable unit.
    • Patients maintain a diary of activities to correlate with readings.

Collaborative Care for Hypertension Management

  • Recommended Strategies:
    1. Diet Management: Monitor sodium intake and maintain a balanced diet.
    2. Exercise: Engage in moderate-intensity exercise for at least 30 minutes per day.
    3. Smoking Cessation: Strongly advised.
    4. Stress Management: Consider referrals for counseling or support groups.

Understanding Hypertensive Crisis

  • Crisis manifests as severely elevated blood pressure requiring immediate treatment.
  • Signs of Hypertensive Emergency:
    • May include: Hypertensive encephalopathy, severe headache, nausea/vomiting, chest pain, confusion, coma, and blurred vision.

Case Study: Nursing Care of Mr. Gray

  • Questions for Consideration:

    1. Additional information needed: Patient history, Body Mass Index (BMI).
    2. Immediate nursing actions: Check blood pressure status.
    3. Potential nursing diagnoses: Ineffective tissue perfusion.

  • Monitoring Parameters:

    • Electrocardiogram (ECG)
    • Vital signs with frequent checks
    • Neurological status to monitor for signs of stroke
    • Urinary output, conducted hourly to assess kidney function.
    • Ensure patient safety considering confusion or agitation, which heightens falling risk.

Drug Calculation Example

  • Nitroprusside Drip Calculation:
    • If the nurse is to start a sodium nitroprusside drip at 2 mcg/kg/min, with a bag containing 50 mg of nitroprusside in 250 ml of D5W, and Mr. Gray weighing 172 lbs:
    • Conversion from lbs to kg: 172 lbs = 78.18 kg.
    • Drip Rate:
      ext{Drip Rate} = rac{2 mcg}{kg imes ext{min}} imes 78.18 kg = 156.36 mcg/min
    • To determine the mL/hour setting for the pump, use:
      ext{Pump Rate} = rac{156.36 mcg/min}{ rac{50 mg}{250 ml}} = 78.18 ml/hr

Exam Practice Question

  • Scenario:
    • The nurse is caring for a patient with hypertension reporting a severe headache and low level of consciousness, current BP = 220/115 mmHg.
  • Initial Intervention Options:
    1. Administer a 250 ml normal saline bolus.
    2. Notify the healthcare provider immediately. (CORRECT ANSWER)
    3. Reassess the blood pressure in 30 minutes.
    4. Position the patient supine with legs elevated.