Dismiss Modal

Definition

The Heart

Choose a preferred language

Click on the links below to learn more about this topic.

About the Heart and Blood Vessels

Anatomy and Function of the Heart Valves

Anatomy and Function of the Electrical System

Heart Transplantation

© 2000-2025 The StayWell Company, LLC. All rights reserved. This information is not intended as a substitute for professional medical care. Always follow your healthcare professional's instructions.

Healthy Heart, Healthier Life

Don’t wait to get answers about chest pain or high blood pressure.

Find a Cardiologist

Personalized care starts with the right provider

Search by specialty, location, and more.

Find a Doctor
Related Articles
Read article
Heart Health
Anatomy and Function of the Heart Valves

Detailed anatomical description of the heart valves, including simple definitions and a labeled, full-color illustration.

Read article
Heart Health
Dilated Cardiomyopathy

Learn about dilated cardiomyopathy, including causes, risks, symptoms, diagnosis, treatment, and prevention.

Read article
Heart Health
Anatomy and Function of the Coronary Arteries

Detailed information and illustrations about the two coronary arteries, which supply blood to the heart muscle.

Read article
Heart Health
Heart Failure

Heart failure is a condition in which the heart can't pump enough blood to meet the body's needs.