The top (atrium) and bottom (ventricle) parts of the heart are separated by a valve‚ which prevents the backflow of blood. Blood enters the heart through the inferior and superior vena cava carrying deoxygenated blood. The vena cava then empties into the right atrium. When the right ventricle is relaxed‚ blood flows from the atrium into the right ventricle. The blood is then pushed through the pulmonary semilunar valve into the pulmonary artery where it carries deoxygenated blood to the lungs for
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CARDIOVASCULAR Dsyrhythmias * Etiology * Disturbances in automaticity – initiation of impulse is altered * Disturbances in conduction – alteration in the speed the impulse travels * Reentry of impulses – cardiac tissue is depolarized multiple times by the same impulse * Speed‚ distance and location can be changed or affected (blockages cause change in heart rhythm) * Risk factors * Cardiovascular disease‚ MI * MI – death of tissue – no electricity
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CARDIOVASCULAR SYSTEM OF THE HEAD NECK The cardiovascular system consists of the heart‚ blood vessels‚ and the approximately 5 liters of blood that the blood vessels transport. Responsible for transporting oxygen‚ nutrients‚ hormones‚ and cellular waste products throughout the body‚ the cardiovascular system is powered by the body’s hardest-working organ — the heart‚ which is only about the size of a closed fist. Even at rest‚ the average heart easily pumps over 5 liters of blood throughout
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What is the job of the Circulatory System? The Circulatory System is responsible for transporting materials throughout the entire body. It transports nutrients‚ water‚ and oxygen to your billions of body cells and carries away wastes such as carbon dioxide that body cells produce. It is an amazing highway that travels through your entire body connecting all your body cells. Parts of the Circulatory System The circulatory System is divided into three major parts: 1. The Heart 2. The
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the tunica adventitia. Veins‚ in contrast‚ are subjected to much lower pressures and have thinner walls overall‚ with the tunica adventitia often outsizing the tunica media. Because thinwalled veins conduct blood back to the heart against gravity‚ valves (not present in arteries) also are present at intervals to
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Classification and Regulation of Classification and Regulation of Non-roller Type Cardiopulmonary Non-roller Type Cardiopulmonary Bypass Blood Pumps Bypass Blood Pumps 21 CFR 870.4360 21 CFR 870.4360 Catherine P. Wentz‚ M.S. Division of Cardiovascular Devices Office of Device Evaluation Food and Drug Administration Circulatory System Devices Panel Meeting December 6‚ 2012 Objective of This Panel Meeting Objective of This Panel Meeting Non-Roller type Cardiopulmonary Bypass Blood
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ventricles. The atria and ventricles work together contracting to release the blood they contain. The valves open and close to let the blood flow in only one direction‚ there are 4 valves The two atrioventricular (AV) valves‚ which are between the atria and the ventricles and The two semilunar (SL) valves‚ which are in the arteries leaving the heart‚ are the aortic valve and the pulmonary valve. There are three varieties of blood vessels: arteries‚ veins‚ and capillaries. During blood circulation
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layer is called the myocardium and is composed of cardiac muscle which contracts. The inner layer is called the endocardium and is in contact with the blood that the heart pumps. Also‚ it merges with the inner lining of blood vessels and covers heart valves. The human heart has four chambers‚ two superior atria and two inferior ventricles. The atria are the receiving
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* Founded in 1949‚ Medtronic is the world’s largest Medical Technology Company and also a Fortune 500 company. Medtronic specializes in medical devices and therapies to treat over 30 chronic diseases. With headquarters located in Fridley‚ Minnesota the company has over 41‚000 employees bringing in annual revenue of $14.599 Billion dollars. (1) Due to patient’s positive feedback and the results of Medtronic‚ Co-founder Earl Bakken came up with a mission statement half a century ago that continues
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identification of certain physical characteristics that are commonly prevalent in MFS subjects. Although Marfan Syndrome is characterized by a triad of symptoms‚ most patients only have a few manifestations. Loose joints‚ long thin extremities‚ and aortic aneurysms are the primary symptoms of MFS. These clinical manifestations may be present at birth or develop later in life (Marfan Syndrome‚ n.d.). Her explanation of the management of this disease was very specific. She explains that MFS management
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