A pediatric cardiologist is a physician that specializes in the examination, diagnoses, and treatment of children’s cardiac conditions and issues. Conditions or issues that this type of physician may see in a patient include heart murmurs, heart development complications, chest pains, or uncommon rhythmic activity. Procedures performed by this type of physician are ones such as exercise tests, electrocardiograms, echocardiograms, or a cardiac catheterization. The well-being of a child and their heart and its cardiac activity is the main focus of a physician within this specialty.