A cardiologist is a doctor specialized in the diagnosis and treatment of diseases of the heart and blood vessels: the cardiovascular system. Performs tests such as electrocardiograms, echocardiograms, and stress tests to evaluate heart health and offers personalized treatments that may include medications, lifestyle changes, and surgical procedures. It is advisable to see a cardiologist if you experience symptoms such as chest pain, difficulty breathing, palpitations, dizziness, or if you have a family history of heart disease.