Chapter 11 Part 1.pptx

Hypertension sustained abnormally high blood pressure

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Hypertension : Sustained abnormally high blood pressure. What is Blood pressure? Blood pressure increases due to increase amount of blood flow or increase in resistance to it. Category Systolic (mmHg) Diastolic (mmHg) Normal <120 and <80 Pre-hypertension: 120-139 Or 80-89 Hypertension: Stage 1 140-159 Or 90-99 Stage 2 160 and above 100 and above
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Mechanism behind High Blood pressure: 1. Reduce diameter of artery (vasoconstriction or Atherosclerosis) Atherosclerosis : A form of CVD in which the inner layers of artery walls are made thick and irregular by plaque deposits; arteries become narrowed, and blood supply is reduced 2. Increase in C.O . 3. Arterial wall hardening (vicious cycle) HTN Considered as Silent killers : may not show symptoms for long time 53% American adults(age>20 yrs.) are suffering with HTN and Pre-HTN. 11-9
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11-10 C. Cholesterol Imbalance What is cholesterol? Wax like subs., circulate through blood, important component of cell membrane, Sex hormones, Vit.D, fluid covering lungs and sheath covering nerves. Excess of cholesterol in blood can cause CVD. Cholesterol manufactures in liver and travels in blood with help of Lipoprotein (HDL and LDL). Level of HDL and LDL decides level of cholesterol in blood. One should test cholesterol level once in every five years after age of 20.
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Cholesterol level Low-density lipoprotein (LDL) Lipoprotein with moderate amount of protein and large amount of cholesterol; “bad” cholesterol Shuttle Cholesterol from liver to organs Excess of LDL and cholesterol: Plaque formation, Inflammation and damage to artery wall. High-density lipoprotein (HDL) Lipoprotein with relatively little cholesterol that helps transport cholesterol out of the arteries; “good” cholesterol Carries unused cholesterol back to the liver for recycling. 11-11
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Cholesterol Level Blood Cholesterol guidelines : Total : less than 200mg/dl LDL: less than 100mg/dl HDL: 40 – 60 mg/dl Triglycerides: <150mg/dl Improving cholesterol levels Reducing LDL should be the primary goal, Can be done by Diet modification Raise the HDL levels by exercising, losing weight, quitting smoking, and altering the amount and type of fat you consume 11-12
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D. Physical inactivity
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  • Fall '19
  • Atherosclerosis,  Affect

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