A cardiologist is a doctor who specializes in diagnosing and treating heart-related conditions. They focus on issues like heart disease, high blood pressure, and arrhythmias, which are irregular heartbeats. Cardiologists use various tests, such as echocardiograms and stress tests, to understand how well the heart is functioning and to determine the best treatment options. In addition to treating patients, cardiologists also play a vital role in preventing heart problems. They educate people about healthy lifestyle choices, such as maintaining a balanced diet and exercising regularly. By promoting heart health, cardiologists help reduce the risk of serious conditions like heart attacks and strokes.