Cardiologist Say: kar-dee-ah-luh-jist This kind of doctor knows all about the heart and how it works. If a kid has a heart problem, he will visit a pediatric cardiologist, who mainly treats kids. Cardiologists treat all kinds of heart problems, from heart murmurs to hearts that miss a beat. Back to Articles Related Articles Note: All information is for educational purposes only. For specific medical advice, diagnoses, and treatment, consult your doctor. © 1995-2021 KidsHealth®. All rights reserved. Images provided by The Nemours Foundation, iStock, Getty Images, Veer, Shutterstock, and Clipart.com.