HEALTHHEARTDISEASENORCO

HEALTHHEARTDISEASENORCO - Cardiovascular Disease •...

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Unformatted text preview: Cardiovascular Disease • Cardiovascular Disease (CVD) is the leading cause of death in the US, claiming one life every 33 seconds. • 1. Tobacco Use • 2. High Blood Pressure (Hypertension) • 3. Unhealthy Cholesterol Levels • 4. Physical Inactivity • 5. Obesity • 6. Diabetes Risk Factors for CVD Established By American Heart Association Blood Supply to the Heart Circulation in the Heart 1 . 2 2. Dicotomous Functions for Left & Right Side of Heart • Right Side : Collects oxygen-poor blood from the body and brain and pumps to the lungs where it picks up oxygen. This is called pulmonary circulation . • Left Side: Collects oxygen-rich blood, which has just passed through the lungs, and pumps it to the rest of the body and brain. The is called systemic circulation . Blood Vessels • Arteries- Are have thick walls and are Elastic . They Carry blood away from the heart. Arteries become smaller arterioles and branch into capillaries. • Veins-Carry blood to the Heart. Veins become smaller venules and and connect with the capillaries • Capillaries- Exchanges between cells and nutrients/oxygen occur here only. The Pathway Back To the Heart LUB-DUB SYSTOLE- period when the heart CONTRACTS DIATOLE- when the heart RELAXES Critical Factor Concerning Arteries: ELASTICY • If arteries are HEALTHY, they are clear and very elastic. They can accommodate greater CO.as they S..T..R..E..T..C…H • Use equation for Pressure equals F/a to show this. Blood Pressure BP = CO x PR Where: CO is Cardiac Output PR is Peripheral Resistance Blood Pressure • We speak of arterial blood pressure in terms of two measurements; on and off. In other words when the heart contracts or is in SYSTOLE the arterial pressure is highest or at its peak. When the heart is relaxing or in DIASTOLE it BP is at the lowest . • BP is measured in ml. and the Brachial artery of arm is used for this test. • Blood Pressure is related to Cardiac Output times Peripheral Resistance ( the amount of friction encounter as blood tries to flow through the vessel) Listen to your numbers • Your blood pressure can tell you a lot. A normal, healthy blood pressure for most adults is 120/80 mm Hg or lower . You have hypertension if your numbers are consistently 140/90 mm Hg or higher. COMPARE Age (years) Systolic pressure (mmHg) Diastolic pressure (mmHg) New-born 80 46 10 103 70 20 120 80 40 126 84 60 135 89 Table 1. Some 'average' Understand the pressure • When you have high blood pressure, the force of your blood moving through your blood vessels is TOO GREAT . • This makes your heart WORK HARDER than it’s supposed to in order to pump blood throughout your body. Sympathetic Nervous System • Epinephrine and Norepinephrine are both produced by the medulla of the adrenal glands....
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This note was uploaded on 12/08/2011 for the course HES 1 taught by Professor Dianeolin during the Fall '11 term at Riverside Community College.

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HEALTHHEARTDISEASENORCO - Cardiovascular Disease •...

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