A cardiologist is a medical doctor who specializes in diagnosing and treating conditions related to the heart and blood vessels. They focus on diseases such as coronary artery disease, heart failure, and arrhythmias. Cardiologists use various tests, including echocardiograms and stress tests, to assess heart health and determine the best treatment options. In addition to treating existing heart conditions, cardiologists also work on prevention strategies to help patients maintain a healthy heart. They may provide guidance on lifestyle changes, such as diet and exercise, and prescribe medications when necessary. Their expertise is crucial for managing heart health and improving overall well-being.