Angina
WHAT IS IT?
Angina is chest pain caused by not enough blood flow to the heart muscle. If blood flow is not restored, it can lead to more heart damage. The most common cause is coronary artery disease (CAD), where atherosclerotic plaque (fatty buildup) ruptures and a clot forms. Other causes include anemia (low red blood cells), heart failure, stress or overexertion, and abnormal heart rhythms.
Quick Concept: The chest pain happens because the heart muscle is not getting enough oxygen for the work it is doing.
TYPES
- Stable: comes with exertion (activity). Relieved by nitroglycerin.
- Unstable: comes at rest. Lasts longer. NOT relieved by nitroglycerin.
- Variant: unpredictable.
ASSESSMENT
- Chest pain
- Dyspnea on exertion (shortness of breath with activity)
- Hypotension (low blood pressure) from decreased cardiac output (amount of blood the heart pumps)
- Hypertension (high blood pressure) from increased stress on the heart
- Bradycardia (slow heart rate) from decreased cardiac output
- Supraventricular tachycardia (fast heart rate from above the ventricles) from increased stress on the heart
- Atrial fibrillation (irregular heartbeat) from increased stress on the heart
- Syncope (fainting)
- Pale skin
- Diaphoretic (sweaty)
MANAGEMENT
- Goal: restore blood flow, decrease chest pain, and improve activity tolerance.
Medications (anticipated):
- Thienopyridines (clopidogrel)
- Heparin (blood thinner)
- Renin-angiotensin blockade (ARBs or ACE inhibitors)
- Oxygen
- Morphine (only if indicated by facility)
- Beta blockers
- Nitroglycerin (per facility policy)
Monitoring and tests:
- EKG (electrocardiogram, heart tracing) to rule out STEMI (a type of heart attack) and monitor arrhythmias (abnormal rhythms)
- Monitor vital signs (HR, BP, SpO2) for changes
- Cardiac enzymes to find heart muscle damage
- Cardiac stress test to find the point of heart stress
- Cluster care (group tasks together) so the client can rest and lower the heart's oxygen demand