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7 Cards in this Set
- Front
- Back
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what is hypertenison?
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elevation in BP
caused by peripheral arerial resistance only 50% of the 50 million diagnosed. have their BP under control at least 50 million others have hypertension few signs/symptoms: silent killer |
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defined: systolic > 140 mmhg
diastolic > 90 mmhg affects women more, men tolerate it less! |
affects blood vessels in the:
eyes heart kidneys brain |
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consequences are:
failing vision coronary occulusion renal failure CVA |
cause is increase peripheral resistance
why increase is poorly understood treatment goals ::SLDJajsf |
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factors involved w/ HTN"
stress(freq. emotional disturbances) obesity(esp appled shaped) excessive etoh intake smoking overuse of caffeine overuse of stimulatory drugs HTN is strongly familial. meaning/?? |
like a parent has it too
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3 factors contribute to essential HTN:
hyperactivity of symp nervous system hyeractivity of renin angiotensin system endothelial dysfunction what else? |
sympathetic nervous system
normally: when BP is low baroceptors in lg vessels respond tell brain to stimulate adreneals more norepinephrin & epinephrine cause vessels to constrict / hi HTN if this system hyperactive, leads to HTN |
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WHEN BLOOD VOLUME DECREASE (0R KIDNEYS NOT PERFUSED WELL) KIDNEYS PRODUCE RENIN
PRECUSOR TO ANGIOTENSIS i WHAT THEN |
IN THE LUNGS: ANGIOCONVERTING ENZYME CHANGE ANIO I TO ANGIO 2 MOST POWERFUL VASOCONSTRITOR IN BODY
ANGIO 2 CAUSES VESSELS TO CONSTRICT STIMULATES ADRENALS TO MAKE ALDOSTERONE (RETAINS NA+ AND WATER) |
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S/sX "
headaches chest pains nosebleeds weak/numb extemity on occasion visual distubance dizziness |
risk factors
blacks elderly familial emotional stress fat booze dm hi salt diet smoking couch potato hi cholesterol level inactivity lower education/sociaeconomic status |
