Like all muscle, the heart needs a source of energy and oxygen to function. The heart's pumping action is regulated by an electrical conduction system that coordinates the contraction of the various …

Your cardiac conduction system is the network of nodes, cells and signals that controls your heartbeat. Electrical signals move through your heart, making it beat.

What makes your heart beat? Your heart is controlled by electrical signals that tell its muscles when to contract and when to relax. Each pulse begins in the right atrium at the sino-atrial (SA) node.

In the simplest of terms, the heart is a pump made up of muscle tissue. The heart's pumping action is controlled by an electrical conduction system that coordinates the contraction of the heart chambers.

To begin pumping, your heart muscle has to contract in a uniform way. Contraction starts when an electrical message goes out to each cell in your heart muscle. Your heart’s electrical system has a …

Normally, the heartbeat starts in the right atrium in a group of special heart cells called the sinoatrial (or sinus) node. These cells act as a pacemaker for the heart. The heart's pacemaker sends out an …

2 days ago · The heart is an independent electrical generator that powers its own mechanical contractions. This process, known as cardiac conduction, is the highly organized system of electrical …

3 days ago · The electrical system of the heart is critical to how it functions. It controls the electrical impulses that cause your heart to beat and their conduction, which organizes the beating of your …

3 days ago · Heart, organ that serves as a pump to circulate the blood. It may be as simple as a straight tube, as in spiders and annelid worms, or as complex as the four-chambered double pump that is the …

Detailed anatomical description of the heart's electrical system, including simple definitions and a labeled, full-color illustration.