Heart - Wikipedia, the free encyclopedia
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The heart is a muscular organ found in all vertebrates that is responsible for pumping blood throughout the blood vessels by repeated, rhythmic contractions. The term cardiac (as in cardiology) me...
en.wikipedia.org/wiki/Heart
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The Medscape Journal ... Heart Atria [surgery] ... Heart Conduction System [surgery]
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www.medscape.com/medline/abstract/5588970
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BACKGROUND AND OBJECTIVE: To investigate the effects of barbiturates on batrachotoxin-modified sodium channels from different regions of the human heart. Single sodium channels from human atria were studied and compared with existing data from the human ventricle and from the central nervous system.
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www.medscape.com/medline/abstract/12790206
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The superior vena cava is one of the two main veins bringing de-oxygenated blood from the body to the heart. Veins from the head and upper body feed into the superior vena cava, which empties into the right atrium of the heart.
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www.cardioconsult.com/Anatomy/
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The SA node is the heart's electrical pacemaker. It is a small patch of cells located in the wall of the right atrium; the frequency with which the SA node discharges determines the rate at which the heart beats.
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www.medicinenet.com/atrial_fibrillation/article.htm
www.medicinenet.com/atrial_fibrillation/article.htm
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A look at this disease and its alternative name, the causes, and risk factors. ... Over time, more blood backs up into the left upper chamber of the heart (atrium) from the left ventricle, and the heart has to work harder to pump blood to the rest of the body. This may lead to congestive heart failure.
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www.nlm.nih.gov/medlineplus/ency/article/000176.htm
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During an episode of A Fib or AFL, the heart muscle does not contract normally to force open the heart valves that pass blood from the atrium to the ventricle. The valve opens passively, but some blood may not enter the ventricle as it should.
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www.hrspatients.org/patients/heart_disorders/atrial_fib...
www.hrspatients.org/patients/heart_disorders/atrial_fibrillation/default.asp
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There are four chambers in the heart - two atria and two ventricles. The atria (one is called an atrium) are responsible for receiving blood from the veins leading to the heart. When they contract, they pump blood into the ventricles.
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www.accessexcellence.org/AE/AEC/CC/heart_anatomy.html
www.accessexcellence.org/AE/AEC/CC/heart_anatomy.html
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the upper chamber of each half of the heart. ... Syn: atrium cordis, atrium (2) ... Heart Disease...
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dictionary.webmd.com/terms/atrium-of-heart
dictionary.webmd.com/terms/atrium-of-heart
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