Angina (an-JIE-nuh or AN-juh-nuh) is a specific type of chest pain caused by severely reduced blood flow to the heart muscle. It is a symptom of underlying coronary artery disease, rather than a disease itself.
Patients typically describe the sensation as an intense squeezing, pressure, heaviness, or tightness in the center of the chest.
Angina is relatively common, but it can be notoriously difficult to distinguish from other types of chest discomfort, such as severe indigestion or heartburn. If you experience unexplained chest pain, always seek immediate medical attention rather than trying to diagnose it yourself.
Symptoms
The pain is frequently described as feeling like a heavy weight has been placed on the chest or a vise is squeezing it. Common symptoms include:
- Chest pain or discomfort: (Pressure, squeezing, fullness, or an aching sensation).
- Pain radiating to the arms, neck, jaw, shoulder, or back.
- Nausea or extreme indigestion.
- Profound, unexplained fatigue.
- Shortness of breath.
- Sudden cold sweating.
- Dizziness or lightheadedness.
Types of Angina
It is crucial to understand the clinical difference between the major types of angina:
- Stable Angina: The most common and predictable form. It occurs during physical exertion (like climbing stairs or exercising) and stops quickly with rest or medication.
- Unstable Angina (Medical Emergency): Occurs unpredictably, even at complete rest. The pain lasts longer (often up to 30 minutes) and may not disappear with medication. It is a major warning sign that a heart attack is imminent.
- Variant (Prinzmetal's) Angina: Rare. Happens exclusively at rest (often between midnight and early morning) due to a sudden spasm in the heart's arteries.
If your chest pain lasts longer than a few minutes and does not immediately go away with rest or your prescribed angina medication, it may be a heart attack. Call 911 or your local emergency number immediately. Do not attempt to drive yourself to the hospital unless you have absolutely no other choice.
Causes & Risk Factors
Angina is caused by Myocardial Ischemia—a condition where your heart muscle desperately needs more oxygen than it is receiving because the blood flow is physically restricted.
Atherosclerosis (cholesterol plaque buildup in the arteries) is the most common underlying cause.
Risk Factors
- Tobacco Use: Smoking permanently damages artery walls, allowing cholesterol plaques to collect and block flow.
- Diabetes: Massively increases the risk of coronary artery disease and heart attacks.
- High Blood Pressure: Chronically damages and hardens the arteries over time.
- High Cholesterol: High levels of LDL ("bad") cholesterol create the physical blockages.
- Obesity & Inactivity: Directly contributes to high blood pressure, high cholesterol, and type 2 diabetes.
- Stress: Surges of adrenaline and stress hormones can increase blood pressure and cause arteries to temporarily narrow.
Diagnosis
To accurately diagnose angina, doctors will perform a physical exam, review your symptoms, and order specific cardiac tests:
- ECG (Electrocardiogram): Immediately measures the electrical activity of the heart to check for ongoing damage.
- Stress Test: Monitoring your heart's rhythm and breathing while you walk on a treadmill or ride a stationary bike to force the heart to work harder.
- Echocardiogram: Uses ultrasound sound waves to create a real-time image of the heart pumping.
- Coronary Angiography: Uses X-rays and a special injected dye to visually see exactly where the blood vessels are narrowed or blocked.
- Blood Tests: To quickly check for specific heart enzymes that leak into the blood when the heart muscle is actively damaged.
Treatment Options
Treatment is tailored to reduce the immediate pain of symptoms and lower your long-term risk of suffering a fatal heart attack.
1. Lifestyle Changes
This is always the first and most critical line of defense:
- Quit smoking immediately.
- Lose excess weight to reduce the workload on the heart.
- Strictly control diabetes and blood pressure.
- Adopt a heart-healthy diet (rich in whole grains, lean proteins, fruits, and vegetables).
- Learn to pace yourself during physical activity and manage emotional stress.
2. Medications
- Nitrates (Nitroglycerin): The classic angina treatment. It rapidly relaxes and widens blood vessels, allowing more blood to reach the heart muscle.
- Aspirin: Reduces the blood's ability to clot, keeping blood flowing smoothly through narrowed arteries.
- Beta Blockers: Slow the heartbeat and lower blood pressure to physically reduce the heart's demand for oxygen.
- Statins: Aggressively lower blood cholesterol and stabilize existing plaques so they don't rupture.
- Calcium Channel Blockers: Relax and widen the coronary blood vessels to increase flow.
3. Surgical Procedures
- Angioplasty & Stenting: A catheter with a tiny, deflated balloon is threaded into the blocked artery. The balloon is inflated to widen the artery, and a wire mesh tube (a stent) is permanently left in place to keep the vessel propped open.
- Coronary Artery Bypass Surgery (CABG): A surgeon takes a healthy vein or artery from elsewhere in your body (usually the leg or chest) and uses it to literally bypass the blocked coronary artery, creating a brand-new path for blood flow.
Frequently Asked Questions (FAQs)
What is the difference between angina and a heart attack?
Angina means your heart muscle is temporarily starving for oxygen due to narrowed arteries, but the muscle is not dying. A heart attack occurs when the blood flow is completely blocked off (usually by a blood clot), and the heart muscle actually begins to die. Unstable angina is often the immediate precursor to a heart attack.
Can angina be completely cured?
There is no "cure" for coronary artery disease, which causes angina. However, with the right combination of aggressive lifestyle changes, daily medications, and potentially surgical procedures like stenting, angina symptoms can be heavily managed, allowing you to live a normal, active life.
References
- American Heart Association (AHA) - Angina Pectoris
- National Heart, Lung, and Blood Institute (NHLBI) - Angina
- Mayo Clinic - Angina Symptoms and Causes
Comments
Post a Comment