What is Acute Coronary Syndrome (ACS)?
Acute Coronary Syndrome (ACS) is a serious heart condition that happens when the blood flow to the heart suddenly decreases or stops. This can lead to chest pain (angina) or a heart attack (myocardial infarction). It is a medical emergency that needs quick treatment to prevent damage to the heart.
Types of Acute Coronary Syndrome
ACS includes three main conditions:
Unstable Angina – Severe chest pain that occurs due to reduced blood flow to the heart. No damage to cardiac cells. Pain occurs even at rest and is not relieved by medicine.
Non-ST Segment Elevation Myocardial Infarction (NSTEMI) – A type of heart attack where there is partial blockage of blood flow to the heart.
ST Segment Elevation Myocardial Infarction (STEMI) – A serious heart attack caused by a complete blockage of a heart artery.
Symptoms of Acute Coronary Syndrome
The symptoms of ACS can vary from mild to severe and can happen suddenly. The common symptoms include:
Chest pain or discomfort (pressure, tightness, or burning sensation). This is the most common symptom.
Pain in other body parts (arms, shoulders, neck, jaw, or back)
Shortness of breath
Nausea or vomiting
Sweating (cold sweats)
Dizziness or feeling lightheaded
Unusual fatigue (feeling very tired without reason)
Sometimes, symptoms may be different in women, older adults, and people with diabetes. Chest pain may not occur in women, older adults, and people with diabetes.
Causes of Acute Coronary Syndrome
ACS is caused by a sudden blockage or narrowing of the heart’s arteries, which reduces blood supply to the heart. The main causes include:
Plaque Buildup (Atherosclerosis) – Fat and cholesterol collect in the arteries, forming plaques.
Plaque Rupture – The plaques can break, causing blood clots to form and block the artery.
Blood Clots (Thrombosis) – Clots can form inside the arteries, stopping blood flow to the heart.
Spasms in Coronary Arteries – The heart’s arteries may suddenly tighten, reducing blood flow.
Risk Factors for Acute Coronary Syndrome
Some people are at a higher risk of developing ACS. The major risk factors include:
High blood pressure (Hypertension)
High cholesterol levels
Smoking
Diabetes
Obesity (Being overweight)
Lack of physical activity
Unhealthy diet (High in fat, sugar, and salt)
Family history of heart disease
Stress and excessive alcohol consumption
Diagnosis of Acute Coronary Syndrome
Doctors use different tests to check if someone has ACS:
Electrocardiogram (ECG or EKG) – Checks the heart’s electrical activity to detect signs of a heart attack.
Blood Tests (Cardiac Biomarkers) – Looks for heart damage by measuring certain proteins like troponin.
Coronary Angiography – Uses dye and X-rays to see blockages in the heart arteries.
Echocardiogram (Heart Ultrasound) – Shows how well the heart is pumping blood.
Myocardial perfusion imaging- in this test an radioactive substance is injected intravenously. While the substance travels through the heart, pictures are taken from a specialized camera. This can detect the areas where there is less or no blood flow.
CT angiogram
Treatment of Acute Coronary Syndrome
Treatment for ACS should be started immediately to restore blood flow to the heart. The main treatments include:
a) Medications:-
Thrombolytics– these drugs break the blood clot that obstruct blood flow. (example- Streptokinase, Tenecteplase )
Blood Thinners (Anticoagulants) – Prevent further clotting in the arteries ( example Aspirin, clopidogrel )
Beta-Blockers – Reduce heart workload and lower blood pressure (such as Metoprolol )
Nitroglycerin – Relieves chest pain by widening blood vessels (blood flow to the heart increases)
Statins – Lower cholesterol levels to prevent further plaque buildup.
b) Procedures and Surgery:-
Angioplasty and Stenting – A small balloon is used to open blocked arteries, and a stent (a small mesh tube) is placed to keep the artery open.
Coronary Artery Bypass Graft (CABG) – Surgery to bypass blocked arteries using blood vessels from other parts of the body.
Lifestyle Changes:
Eating a healthy diet (low in fat, salt, and sugar). Lose weight if you are overweight.
Good sleep habit– sleep 8 hours per day and at a scheduled time.
Quitting smoking
Exercising regularly. Talk to your doctor about what kind of exercise is suitable for you.
Managing stress by medication or other activities.
Controlling blood pressure, cholesterol, and diabetes
Limit alcohol intake if you take alcohol.
Conclusion
Acute Coronary Syndrome is a life-threatening condition that needs immediate medical attention. It is caused by reduced blood flow to the heart due to blockages in the arteries. Recognizing the symptoms early and getting timely treatment can save lives. People can reduce their risk by leading a healthy lifestyle, managing medical conditions, and following their doctor’s advice.
