BIOL355 Lecture Notes - Lecture 31: Valvular Heart Disease, Haversian Canal, Coronary Artery Disease

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Sudden blockage (plaque or blood clot) in coronary artery. After 4 min. that part of the heart dies. Depending on extent of damage, blood flow to the brain, First heart attacks are fatal 65% of the time. Signs of a heart attack: important organs and person dies abdomen (2 mins. Painful tightness, pressure or discomfort in the chest or. Pain that spread to the shoulders, neck, jaws or arms. Nausea, dizziness, fainting sweating, paleness shortness of breath or difficulty breathing. A condition in which the heart becomes weak and unable to pump enough blood to meet the needs of the body. May involve one or more chambers (usually left ventricle) Causes blood circulation to slow down and become inefficient if in left ventricle then results in backup of blood via pulmonary vein into lungs. Very common after 65 risk factors can include: 2 major components: bones + joints (attaches bones together) Gives bone flexibility, tensile strength, withstand twisting.

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