EEMB 50 Non Infectious Diseases
EEMB 50 Non Infectious Diseases
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This 2 page Reader was uploaded by Gabriela Lopez on Friday April 25, 2014. The Reader belongs to a course at University of California Santa Barbara taught by a professor in Fall. Since its upload, it has received 95 views.
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Date Created: 04/25/14
EEMB 50 Lecture 11 April 23 2014 The Human Heart How it Fails 0 Holes within the heart Ventricular Septum 0 We evolved from animals with 2 chamber hearts 0 Advantages of a 4 chambered heart 1 Efficient gas exchange 2 High oxygen efficiency 3 Can contain two different pressures within our two systems 0 Blood doesn t stay in the heart it is always passing 0 Heart is supplied with blood from arteries Coronary arteries which surround the heart like a crown 0 Vast majority of heart problem deaths are caused by problems that begin in coronary arteries which interferes with the blood supply to the heart itself 0 Angina is chest pain that is associated with poor blood ow to the heart 0 Edward Jenner was a doctor who noticed angina while he practiced autopsies because doctors would perform their own autopsies and would learn this way 0 Plaque is buildup on and in the vessel walls and cause angina 1 These blockages can cause the angina and if blockages are more severe fatal heart attacks can occur 0 Ischemia is a restriction in blood supply to tissues causing a shortage of oxygen and glucose 2 This is very serious for your tissue like the brain and the heart because they start to die off within minutes 3 It is seen as a holding checking 4 Virchow discovered Ischemia and how it will affect tissues when they are active vs when they are not 5 When a tissue is active it is using a lot of oxygen but when it is not getting the blood supply the tissue will become distressed 6 When the brain and heart are oxygen deprived their cells will begin to die within minutes 2 to 3 for less active tissues it will take more time 7 Coronary arteries are important in supplying oxygen and blood to tissues so when there is restriction from plaque and ischemia the heart is affected greatly 0 Ischemic heart disease 0 Coronary artery disease 0 Coronary heart disease 0 Atherososcierosis thickening of the artery wall as a result of the accumulation of fatty materials The plaque actually builds in and not really on the Wall The fattening of the wall causes the angina because the blood cannot ow to heart which causes you to feel pain When these burst there forms a clot and some of these clots escape and break off and go into the bloodstream Heart attacks Impulse sinus node then atrioventricular node Ventricular fibrillation v fib are uncoordinated contractions of the ventricles and there is twitching instead of pumping of blood Vfib cardiogenic shockinadequate blood supply due to heart failure asystole at lineno electrical activity in the heart Single event requires obstruction of large portion of arteries for a heart attack A defibrillator is a procedure in which an electrical device gives an electric shock to the heart and helps establish normal contraction rhythms it is like a restart that helps the pacemaker start beating normally again CPR can also help to restart the heart beat after it has stopped but it must be done correctly and the right amount of pressure must be utilized Series of heart failure 1 Chronic congestive heart failure enough of the heart has been damaged that with each beat it can t supply enough blood to the body 2 There is then uid in the lungs and body parts and this causes swellings 3 It is like a slow drowning death
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