Your Heart's Electrical System
- VHL HealthSheet #82063_VA
The heart has a special system that creates and sends electrical signals. First, signals tell the atria to squeeze. This moves blood to the ventricles. Next, signals tell the ventricles to squeeze. This moves blood to the lungs and body.
How Your Heart Works
- VHL HealthSheet #82003_VA
Your heart is a pumping muscle that works nonstop to keep your body supplied with oxygen-rich blood. Signals from the heart’s electrical system set the speed and pattern of the pump’s rhythm. Valves keep the blood moving in one direction, through the heart’s four chambers.
Coronary Artery Disease
- VHL Video
Coronary artery disease (CAD) is the most common type of heart disease in the United States. CAD develops when the arteries that supply blood to the heart muscle harden and narrow with a buildup of plaque. This video discusses who's at risk for CAD and what you can do to help prevent it.