The heart has four main sections, or "chambers. " � The top two chambers are called the right atrium and left atrium. The bottom two chambers are called the right and left ventricles. Each of these chambers has a valve that keeps blood flowing in one direction. The valves in this picture appear in gray. When the heart is working normally, blood comes in from the body through the right atrium and into the right ventricle. From there it goes to the lungs, where it picks up oxygen. Then the blood comes back through the left atrium, into the left ventricle, and back out to the body through a blood vessel called the aorta. The aorta appears in red. If a valve doesnt work properly, it will either let blood flow backwards in the wrong direction or not let enough blood flow forwards.
Graphic 58389 Version 12.0
View Originalfigure 1Chambers and valves of the heart
The heart has four main sections, or "chambers. " � The top two chambers are called the right atrium and left atrium. The bottom two chambers are called the right and left ventricles. Each of these chambers has a valve that keeps blood flowing in one direction. The valves in this picture appear in gray. When the heart is working normally, blood comes in from the body through the right atrium and into the right ventricle. From there it goes to the lungs, where it picks up oxygen. Then the blood comes back through the left atrium, into the left ventricle, and back out to the body through a blood vessel called the aorta. The aorta appears in red. If a valve doesn't work properly, it will either let blood flow backwards in the wrong direction or not let enough blood flow forwards.
Graphic 58389 Version 12.0
View OriginalBiventricular pacemaker
A biventricular (or "BiV") pacemaker is a device that is used to treat some types of heart failure. The device uses electrical signals to help the heart pump better. The electrical signals travel from a battery to the heart through 3 wires (called "leads") that are put in different parts of the heart. The right atrial lead carries electrical signals to the right upper chamber (right atrium). The coronary sinus and right ventricular leads carry electrical signals to the heart's lower chambers (ventricles).
Graphic 68651 Version 3.0
View Originalfigure 2Biventricular pacemaker
A biventricular (or "BiV") pacemaker is a device that is used to treat some types of heart failure. The device uses electrical signals to help the heart pump better. The electrical signals travel from a battery to the heart through 3 wires (called "leads") that are put in different parts of the heart. The right atrial lead carries electrical signals to the right upper chamber (right atrium). The coronary sinus and right ventricular leads carry electrical signals to the heart's lower chambers (ventricles).
Graphic 68651 Version 3.0
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