DIAG 2725 Heart Class 1 - Cardiac Hemodynamics Anatomy...

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Cardiac Hemodynamics
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Anatomy
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HEART The four chambers of the heart are connected by two sets of valves, The atrio-ventricular (AV) valves and the semilunar valves. The AV valves are the tricuspid valve (connecting the right atrium to the right ventricle) and the mitral valve (connecting the left atria to the left ventricle). The semilunar valves are the aortic valve (connecting the left ventricle with the systemic circulation) and the pulmonic valve (connecting the right ventricle with the pulmonary circulation).
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MTV is # 1 First heart sound occurs due to closure of the mitral and tricuspid valves The second heart sound occurs due to closure of the aortic and pulmonic valves
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The blood flows through the heart silently The heart sounds occurs due to sudden closure of the valves The valves open silently
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When the ventricles contract during systole, the AV valves close and the semilunar valves open to eject blood to the systemic and pulmonary circulation.
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When the ventricles relax during diastole, the semilunar valves close behind the ejected blood column and the AV valves open for blood to again fill the ventricles.
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First heart sound (LUB) Sudden closure of M & T valves due to ventricular contraction causes the beginning of systole
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Second heart sound (DUB) Sudden closure of aortic and Pulmonic valves after the blood column has passed through the great vessels( Aortic and pluming arteries) causes the
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DIAG 2725 Heart Class 1 - Cardiac Hemodynamics Anatomy...

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