Exam 2 Study Guide: Cardiovascular and Cerebrovascular Health

These flashcards cover key topics related to cardiovascular and cerebrovascular health, including risk factors, statistics, and treatment mechanisms.

Average age of Myocardial Infarctions in Men

66 years old

Average age of Myocardial Infarctions in Women

72 years old

Factors that accelerate atherosclerosis

LDLs, high blood pressure, smoking, & high saturated fat intake

High C-reactive protein level indication

Linked to a 2.5-4.5x increased risk of cardiovascular disease (CVD)

Know why aspirin is typically prescribed to CVD/CHD patients.?

-          Aspirin reduces platelet stickiness

Be familiar with associated statistics on how exercise therapy can reduce total mortality
and CHD mortality (i.e. Odds’ ratio)?

-          OR = 0.76

  the effects that regular moderate and vigorous intensity have on C-
reactive protein (Odds’ ratios, percentages)?

-          Moderate PA: OR= 0.85

-          Vigorous PA: OR: 0.53

Be familiar with the results of the MRFIT study?

-          On the 6 years follow up, 488 men out of 12,000 died.

-          75-220 kcal/day is the needed energy expenditure to reduce CHD risk in men

Be familiar with stroke rates across ethnic groups?

-          Men: White- 35, Black- 55, Hispanic- 35 Asian- 35, Indian- 30

-          Women: White- 35, Black- 45, Hispanic- 30, Asian- 30, Indian- 30

Be familiar with stroke risk in smokers, people who have high blood pressure, diabetics,
and people who engage in high amounts of physical activity?

-          Smokers; 60% higher

-          High BP; primary independent risk factor for stroke, men are 4x likely to have a stroke if they have hypertension (greater than 160/95), women RR = 4.2

-          Diabetics; Stroke risk doubled, 25% higher in women vs men

-          PA; 20-25% lower risk (RR 0.75-0.80)

Be familiar with the 3 main mechanisms of stroke and be able to identify each?

-          Embolic: circulating blood clots in LV

-          Lacunar: blockages of small arteries deep in the brain

-          Thrombotic: abnormal regulation of hemostatic factors & fibrinolytic system, insufficient anticlotting proteins

Alteplase:

converts plasminogen to the proteolytic enzyme Plasmin, plasmin then breaks down clotting factors fibrin and fibrinogen, 50% success rate, must be administered within 4.5 hrs of symptom onset

Thrombectomy:

Clot removal that grabs the clot via imagine, used in patients with large artery occlusion within 24 hrs of a stroke, 70-90% rate of reperfusion

Ischemic Conditioning:

3-4 short cycles (5 mins of inflation & 5 mins of deflation via tourniquet), stimulates adenosine & bradykinin (vasoD) to be released, 2 hours of brain protection, 12-24 hours of delayed protection and can continue for 48-72 hours

Be familiar with the results of the Harvard Alumni study regarding stroke risk?

-          Inverse relation to self reported weekly energy expenditure

-          Less than 500 kcal/wk = 6.5 per 10,000 person years

-          500-1,999 kcal’wk = 5.2 per 10,000 person years

-          Greater than 2,000 kcal/wk = 2.4 per 10,000 person years

•  list the 5 most common signs of stroke?

-          Sudden numbness/weakness of face, arm, or leg, especially on one side of the body

-          Sudden confusion & trouble with speaking/understanding

-          Sudden trouble seeing in one or both eyes

-          Sudden trouble walking, dizziness, or loss of balance

-          Sudden, severe headaches with no known cause

How many people with diagnosed hypertension take medication to manage the
condition?

-          2/3 of diagnosed people

ACE inhibitors:

relax blood vessels by blocking ACE from producing angiotensin II a vasoC

ARBs:

Blocks Angiotensin II binding sites

Calcium channel blockers:

block calcium channels, reducing the calcium than can enter cells in heart/arteries = decrease in contraction strength & BP

Beta blockers:

Blocks binding sites for catecholamines on the heart

Calcium channel blockers =

increased heart failure rate by 38%

ACE inhibitors:

stroke increase by 15% and heart failure by 19%

Be familiar with the average blood pressure reductions typically seen in the different
antihypertensive drugs we talked about in class.

-          ACE inhibitors: -7mmHg SBP

-          Beta Blockers: -10mmHg SBP

-          ARBs: -8mmHg SBP

-          Calcium channel blockers: -11mmHg SBP

-          Diuretic: -8mmHg SBP

Be familiar with the effects of acute aerobic exercise on total peripheral resistance

-          TPR by 27% and plasma norepi, by 20% in Px with mild HT for up to 90 mins post ExRx

-          Decreased vascular resistance by 7%, Decreased plasma renin activity by 20%

Be familiar with how much of a decrease in resting blood pressure is usually seen across
different interventions (the info is in the table on slide 25).

-          Improved diet: 5 mmHg

-          Aerobic ExRx: 4.6 mmHg

-          Alchol Restriction: 3.8 mmHg

-          Sodium Restriction: 3.6 mmHg

-          Fish oil supps: 2.3 mmHg

Be familiar with the results of the post exercise hypotension study by Padilla et al. we
talked about in class.

-          Hypertensive Px see a 12-14 mmHg decrease in SBP post ExRx

Be familiar with how much of a decrease in blood pressure can be seen in hypertensive
patients as a result of regular dynamic resistance training.

-          Decreases SBP by 2-7 mmHg

Decreases DBP by 3-5 mmHg

Be able to explain in detail the RAAS system of reactions and how it reduces blood
pressure.

-          (1) Renin acts on angiotensin

-          (2) Renin converts angiotensin to angiotensin I

-          (3) ACE converts Angio I to Angio II

-          (4) Angio II binds to receptors on kidneys, brain, and arterioles

-          (5) Increased sodium reabsorption & fluid release back into circulation, increased BP, increased release of Aldosterone

-          (6) Angio II acts on brain by causing productuon of ADH

Be familiar with how risk of CHD changes due to changes in cholesterol

·         For every 1% change in cholesterol there 2% change in CHD risk

·         For every 1% change in LDL-C there is a 2-3% change in CHD risk

·         For every 1 % change in HDL-C there is a 2% and 3% change in CHD risk for men and women

        I.            Be familiar with high cholesterol prevalence around the world and by ethnic group.

        I.            Be familiar with the process of how triglycerides are transported.

·         Triglyceride- is a major form of biological fat

·         Very low density lipo proteins (VLDL), are responsible for transporting triglyceride synthesized in the liver to adipose cells for storage.

        I.            Be familiar with how new HDL molecules are formed (important enzymes).

·         Are secreted from the liver and intestines

Be familiar with the specific mechanisms that are thought to cause the cardioprotective effect of high HDL in the bloodstream.

·         Inhibitions of LDL oxidation

o   Paraoxanse 1 (PON1)

·         Inhibition of adhesion molecules

Be familiar with the results of the Marathon study.

·         Leisure time PA in men 20-60 years old was quantified and adjusted for age, alcohol consumption, smoking, and BMI. Cholesterol was then measured.

o   Each 100kcal/day expended at an intensity > 7kcal/min = 2.09 mg/dl  in
HDL

o   Intensity equal to 9.5-12 kcal/min were associated with lower levels of total
cholesterol and triglycerides.

 Be familiar with the typical cholesterol reductions seen from chronic aerobic exercise training.

Be familiar with the specific mechanism thought to increase HDL formation from a single exercise session

·         High intensity exercise

                    I.            What is the primary cause of dyslipidemia in most people?

·         Are single polygene mutations

o   Overproduction and defective Clearence of triglycerides and LDL cells

o   Underproduction and excessive clearance of HDL cells

·         Secondary cause

o   Excessive salt and fat intake

o   Dietary cholesterol and fat intake

o   Diabetes

o   Alcholol overuse

o   Kidney and liver disease

o   Some hypertension and hiv drugs