Overview
This lecture covers essential nursing implications and guidelines for managing patients on antihypertensive medications, focusing on assessment, monitoring, patient education, and safety considerations.
Patient Assessment Before Therapy
- Obtain a thorough health history and conduct a head-to-toe physical assessment.
- Assess for signs of hypertension, peripheral vascular disease, metabolic syndrome, edema, and heart failure symptoms.
- Evaluate indications and contraindications for specific antihypertensive drugs, such as ACE inhibitors or beta blockers.
- Check baseline blood pressure, pulse, respirations, and electrolytes.
Medication Administration & Monitoring
- Monitor for orthostatic hypotension, especially with alpha antagonists.
- Measure heart rate before administering beta blockers, as they can lower pulse further.
- Monitor potassium levels when using ACE inhibitors; avoid use if potassium >5 mmol/L.
- Evaluate for liver or renal impairment and pregnancy before medication administration.
- Distinguish between cardioselective (beta-1 only) and non-selective (beta-1 and beta-2) beta blockers.
Patient Education
- Stress the importance of taking medication exactly as prescribed and not missing doses.
- Advise patients not to double doses if one is missed; consult physicians for instructions.
- Warn not to stop antihypertensive drugs abruptly due to risk of rebound hypertensive crisis and stroke.
- Instruct patients to keep a blood pressure journal for self-monitoring.
- Educate about symptoms needing immediate medical attention: shortness of breath, swelling, weight gain, chest pain, palpitations, fatigue, angioedema.
Lifestyle and Safety Considerations
- Advise gradual position changes to prevent syncope or orthostatic hypotension.
- Inform about risks associated with hot baths, hot weather, prolonged sitting/standing, and exercise, which may worsen low blood pressure.
- Advise against self-adjusting medication doses or taking over-the-counter drugs without physician approval.
- Emphasize lifestyle changes: weight loss, exercise, DASH diet, stress reduction, smoking cessation, and limiting alcohol intake.
Monitoring Therapeutic and Adverse Effects
- Monitor for dizziness, orthostatic hypotension, fatigue, and signs of toxicity such as hyperkalemia and angioedema.
- Evaluate therapeutic effects: stable, reduced blood pressure and improved symptoms.
- With ACE inhibitors, monitor serum creatinine and potassium levels for kidney function and hyperkalemia.
Key Terms & Definitions
- Orthostatic Hypotension — A drop in blood pressure when standing, causing dizziness or fainting.
- Cardioselective Beta Blockers — Medications affecting only beta-1 heart receptors (e.g., metoprolol, atenolol).
- Non-selective Beta Blockers — Medications affecting both beta-1 (heart) and beta-2 (lungs) receptors (e.g., propranolol).
- Angioedema — Rapid swelling under the skin, often associated with ACE inhibitors.
- Hyperkalemia — Elevated potassium levels in the blood.
- DASH Diet — Dietary Approaches to Stop Hypertension: emphasizes fruits, vegetables, nuts, and low-fat foods.
Action Items / Next Steps
- Monitor vital signs, electrolytes, and kidney function as appropriate for each medication.
- Educate patients on adherence, side effects, and lifestyle modifications.
- Review the DASH diet and implement recommended lifestyle changes.
- Contact the physician if adverse effects or therapeutic issues arise.