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HLTC22H3 (110)
Lecture

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Department
Health Studies
Course
HLTC22H3
Professor
Michelle Silver
Semester
Fall

Description
Cardiovascular system - Carries oxygen and nutrients to all of the bodies cells - Also responsible for removing carbon dioxide and waste - The body contains 6 L of blood. Every minute, heart circulates about 5 L - The functioning of the heart is less efficient as we age - Age related changes: - - enlargement of the heart - Slowing of electrical activity - Slowed pulse - Increased blood pressure - Decreased ability to cool down or heat up - A decrease in artery size makes it harder for arteries to dialate Disease-Related Processes: - hypertension= high blood pressure= 140/90 - Optimal blood pressure for adults is 120/80 - -systolic pressure is peak pressure in the arteries, which occurs near the begininning of the cardiac cycle when the ventricles are contracting - -Diastolic pressure is minimum pressure in the artieries, which occurs near the end of the cardiac cycle when the ventricles are filled with blood - the more blood your heart pumps, the higher the blood pressure Hypertension: - High blood pressure is common condition in which the force of the blood against your artery walls is high enough that it may eventually cause health problems, such as heart disease. - Can be quite serious Symptoms: - Have no signs or symptoms, even if blood pressure reading reach very high levels - Early stage symptoms: dull headaches, dizzy spells, few nosebleeds than normal Arteriosclerosis- the thickening and loss of elasticity of arterial walls. This restricts blood flow Atherosclerosis- build of fatty deposits in the inner lining of the arteries. Peripheral vascular disease- common circulatory problem. Where narrow arteries reduce blood flow. Usually a sign of more widespread accumulation of fatty deposits in the arteries. Can be often treated through key factors such as: not smoking, healthy diet, exercising. Heart Disease broad term used to describe range of diseases that affect the heart. Ex: disease of blood vessels, coronary artery disease, heart rhythm Coronary Heart disease- google it Angina- demand for blood to the heart is greater than supply Heart Attack= CHD can lead to heart attack. An artery is blocked. Blood flow is restricted and essentially blocked. Heart Failure - When the heart cant pump enough blood to meet the bodys needs - Almost exclusively a disease of older people - Fluid backs up in the lungs and seeps into the lungs - Symptoms: shortness of breath, fatigue, confusion, lethargy The Respiratory System Basic Anatomy & Physiology - Decrease in cough reflex - Reduced ability of airways to clean themselves and fight infection - Changes in the respiratory system can make older adults more vulnerable to illness Age Related Changes - Decrease in cough reflex - Reduced ability of airways to clean themselves and fight infection - Changes in the respiratory system can make older adults more vulnerable to illness Disease Related Changes - Lung Cancer - Pneumonia - Chronic obstructive pulmonary disease - Tuberculosis - Most common type of respiratory diseases Lung Cancer - Leading cause of cancer death in Canada - More Canadian women die of lung cancer than of breast cancer - Over million cases each year - Signs and symptoms of lung cancer typically occur only when the disease is advance Cigarette Smoke - Contains over 4800 chemicals - 69 of which are known to cause cancer - It takes 15 years for lungs to completely repair themselves after quitting smoking Pneumonia - Caused by bacteria - Inflammation of the lungs that’s usually caused by infection - Caused by inhaling bacteria into the respiratory tract Aspiration Pneumonia - Google it Chronic Obstructive Pulmonary Disease - general term for several diseases of the respiratory tract Emphysema - Google it - Symptoms: frequent cold/flu, frequent respiratory infections Tuberculosis - kills 2 mill per year - Bacterial infection - Often considered disease of poverty: highest in Africa, a place where there are high rates of HIV/AIDS - People with HIV/AIDS more susceptible to tuberculosis - A person may contract PT from inhaling droplets from a cough or sneeze by an infected person - High
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