The widowmaker heart attack lives up to its ominous name. Cardiologists break down the risks, symptoms, and heart-smart tips to help you avoid one.

Congenital heart disease is any problem with the heart's development that a person is born with. It means the heart has not formed properly. It affects between four and nine children out of every 1000 ...

Your daily habits impact blood flow more than you realize. Learn how small changes in movement, hydration, and sleep can ...

This hole is called a ventricular septal defect (VSD). Oxygen-rich blood from the lungs flows from the left side of the heart, through the VSD opening, and into the right ventricle. Even with this ...

The rarest blood type is Rhnull. Unlike other blood types, people with Rhnull blood have no Rh antigens on their red blood cells. Healthcare professionals classify blood type according to the ...

If circulation is compromised enough, it could cause a heart attack. 7. Poor Cognitive Function Because poor circulation affects all the arteries in the body, it's possible for blood flow to the brain ...

Here's How Flow takes a different approach. The animals communicate with each other through meows, chitters, woofs, and grunts as animals really do. Each moves with striking realism and ...

The sinus node fires off a stimulus that travels through the heart in a very specific way to cause the muscle to contract. The result is an organized contraction that pumps blood most efficiently.

Typically, electrical signals travel from the atria to the ventricles through a group of cells in between them, called the AV node. It is what makes the heart beat and push blood through the chambers.