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A stress test, also known as a cardiac stress test, is a diagnostic procedure used to evaluate how the heart performs under physical stress. The test typically involves exercising on a treadmill or stationary bike while monitoring heart rate, blood pressure, and electrocardiogram (ECG) readings. Alternatively, if a patient cannot exercise, a stress test may involve administering a medication that simulates the effects of exercise on the heart. The goal is to assess the heart's response to stress, identify abnormal heart rhythms, and detect any signs of coronary artery disease or other cardiac conditions. Stress tests are commonly indicated for patients who exhibit symptoms such as chest pain, shortness of breath, or unexplained fatigue, particularly when these symptoms occur during physical activity. The test is also used to evaluate the effectiveness of treatments for heart conditions, assess cardiovascular fitness before major surgery, and screen for heart disease in individuals with risk factors like hypertension, diabetes, or a family history of heart disease. Complications from a stress test are generally rare but can include minor issues such as temporary chest discomfort, shortness of breath, or fatigue during or immediately after the test. More serious complications, though uncommon, may include abnormal heart rhythms, heart attack, or fainting. The risk of such complications is minimized by careful patient selection and monitoring during the procedure. Patients with certain conditions, such as severe heart disease or uncontrolled hypertension, may be at higher risk and require additional precautions. Preparation for a stress test typically involves avoiding caffeine, smoking, and heavy meals before the test, and discussing any medications with the healthcare provider, as some may need to be adjusted. After the test, patients may be monitored for a short period to ensure recovery and to address any immediate issues. A stress test is a valuable tool for evaluating heart health, guiding treatment decisions, and managing cardiovascular conditions effectively.