A spontaneous coronary artery dissection, or SCAD, leads to bleeding inside the artery wall. A survivor shares her symptoms.

Locate the vessels entering and leaving the heart and the 2 heart chambers - atrium and ventricle. Look at diagram of blood flow through the heart - Figure 10.9 on page 97 of lab manual. Next, follow ...

The mitral valve lies between the heart’s left atrium (upper left chamber) and left ventricle (lower left chamber). If the ...

Medically reviewed by Richard N. Fogoros, MD The right atrium is one of the heart's upper chambers that plays a role in blood circulation. It collects deoxygenated blood and directs it on a pathway to ...

Blood enters the upper chambers. These squeeze and ... The tubes that carry blood back to your heart, shown in blue, are called veins. The flow of blood is controlled by strong valves, which ...

A new study suggests that certain substances in the blood may help identify people with a type of irregular heartbeat called ...