Let's get straight to the heart of the matter—the heart's job is to move blood. Day and night, the muscles of your heart contract and relax to pump blood throughout your body. When blood returns ...

These measurements provide insights into total blood flow through the heart tissue ... suspected or known coronary artery disease (CAD) in order to assist clinicalinterpretation of PET perfusion ...

The valves prevent the blood flowing backwards. The heart is relaxed and blood flows into both sides from the veins. The right and left atrium contract. Blood is forced into the right and left ...