### What is Acute Coronary Syndrome?Acute coronary syndrome (ACS) is a term used to describe a range of conditions that result in reduced blood flow to the heart. This can lead to serious heart problems, including heart attacks.### Types of Acute Coronary Syndrome1. **Unstable Angina**: This is a condition where the heart doesn't get enough blood flow and oxygen, but it doesn't cause permanent damage to the heart.2. **Non-ST-Elevation Myocardial Infarction (NSTEMI)**: This type of heart attack doesn't show the classic elevation in the ST segment on an ECG but still causes damage to the heart muscle.3. **ST-Elevation Myocardial Infarction (STEMI)**: This is a more severe type of heart attack that shows a clear elevation in the ST segment on an ECG and causes significant damage to the heart muscle.### Common SymptomsSymptoms of ACS can vary but often include sudden chest pain or discomfort, which may spread to the shoulders, arms, neck, or jaw. Other symptoms can include shortness of breath, sweating, nausea, and lightheadedness.### Risk FactorsRisk factors for ACS include high blood pressure, high cholesterol, smoking, diabetes, obesity, and a sedentary lifestyle.### What to DoAcute coronary syndrome is a medical emergency. If you experience any of these symptoms, seek immediate medical help.