ANGINA PECTORIS
Introduction:
Angina pectoris, commonly known as angina, is chest pain or discomfort resulting from reduced blood flow to the heart muscle. This condition is a symptom of underlying coronary artery disease (CAD) and often indicates an imbalance between the heart's oxygen demand and supply.
Definition:
Angina pectoris is defined as a transient, episodic chest pain or discomfort due to myocardial ischemia, typically triggered by physical exertion or emotional stress and relieved by rest or medication.
Types of Angina:
1. Stable Angina:
> Occurs predictably with exertion or stress.
>Relieved by rest or nitroglycerin.
2. Unstable Angina:
>Unpredictable, may occur at rest or with minimal exertion.
>Not relieved easily; requires emergency treatment.
3. Variant (Prinzmetal’s) Angina:
>Caused by coronary artery spasm, often occurs at rest.
>Can happen in cycles, typically during the night or early morning.
4. Microvascular Angina:
>Occurs due to abnormalities in the small coronary blood vessels.
>Pain may last longer and be less predictable.
Causes:
1. Coronary Artery Disease (CAD): Most common cause; occurs due to plaque buildup in the coronary arteries.
2. Coronary Artery Spasm: Temporary constriction of coronary arteries.
3. Anemia: Reduces oxygen-carrying capacity.
4. Hypertension: Increases heart workload, leading to greater oxygen demand.
Risk Factors:
1. Smoking: Damages blood vessels and increases plaque buildup.
2. High blood pressure and high cholesterol: Contribute to plaque formation.
3. Diabetes: Increases the risk of CAD and angina.
4. Family History of heart disease.
5. Obesity and sedentary lifestyle.
6. Stress and poor diet.
Signs & Symptoms:
1. Chest pain or discomfort – often described as pressure, squeezing, or tightness in the chest.
2. Pain radiating to the neck, jaw, shoulders, or arms (usually the left side).
3. Shortness of breath.
4. Fatigue.
5. Nausea and sweating.
Diagnostic Evaluation:
1. Electrocardiogram (ECG): Detects heart rhythm and possible ischemia.
2. Stress Test: Measures heart response to physical or pharmacologic stress.
3. Coronary Angiography: Visualizes blood flow in coronary arteries.
4. Blood Tests: Check for cardiac biomarkers like troponin, especially in unstable angina.
5. Echocardiogram: Assesses heart function and structure.
Management:
Pharmacologic Treatment:
1. Nitrates (e.g., Nitroglycerin): Relieves chest pain by dilating coronary vessels.
2. Beta-Blockers (e.g., Metoprolol): Reduces heart workload and oxygen demand.
3. Calcium Channel Blockers (e.g., Amlodipine): Relieves spasms in coronary arteries.
4. Antiplatelet Agents (e.g., Aspirin, Clopidogrel): Prevent blood clot formation.
5. Statins (e.g., Atorvastatin): Reduces cholesterol levels and stabilizes plaque.
Non-Pharmacologic Treatment:
1. Lifestyle Modifications:
Quit smoking, reduce alcohol, and manage stress.
Maintain a healthy diet low in saturated fats and cholesterol.
Regular physical activity, as tolerated.
2. Surgical Interventions (if severe):
Percutaneous Coronary Intervention (PCI): Stent placement to open blocked arteries.
Coronary Artery Bypass Grafting (CABG): Bypass surgery for severe blockages.
Nursing Management:
1. Pain Management:
Assess pain level and administer nitroglycerin as prescribed.
Monitor response to medications and document relief.
2. Monitoring Vital Signs:
Regularly monitor blood pressure, pulse, and respiratory rate, especially if medications like beta-blockers are given.
3. Oxygen Therapy:
Administer supplemental oxygen if required to reduce myocardial workload.
4. Educate on Lifestyle Changes:
Instruct the patient on smoking cessation, diet modifications, and gradual physical activity.
5. Medication Education:
Educate on the importance of adherence to prescribed medications, potential side effects, and when to seek help.
6. Psychosocial Support:
Address anxiety or fear rel
ated to angina episodes and provide support.