HTN 1 Flashcards
High blood pressure (or hypertension) is
when your blood pressure or the force of blood flowing through your blood vessels is consistently too high
As human get older there blood vessels get
Stiffer
VENTRICULAR contraction and blood ejection
= Systole
Ventricular relaxation and blood filling
Diastole
If blood pressure is elevated constantly,
it damages arteries and blood vessels
prevalence of hypertension in the US
Half the US have HTN
24% are well controlled.
45% adults in US have HTN > 130/80 or are taking medication
A greater percent of men (47%) have high blood pressure than women (43%)
Mid Eastern and southern states have high blood pressure
It is not well controlled in many cases.
Black adults have a higher rate of hypertension or prevelance.
40-49 or over 60 the HTN is more prevalent
Compliance with medication is problematic.
Very high % of people stop taking meds in their first years
HTN therapy has poor adherence because high blood pressure is
asympotmatic.
Etiology of primary HTN:
90% of the cases we do not know what causes. May be genetic. Environmental reasons. There is no actual reason.
Etiology of Secondary HTN:
Secondary causes: • Renal artery stenosis • Sleep apnea • Endocrine disorder • Cerebral damage • Drug induced
Drug-induced hypertension:
Oral Contraceptives Decongestants Systemic NSAIDs Systemic Corticosteroids Cyclosporine Herbals (Ma Huang, St. John’s wort) Amphetamines MAOIs, SNRIs, TCAs Recreational drugs (“bath salts”, cocaine) High Na+ agents or solutions
Uncontrollable risk factors:
Genetics •
Race: African Americans develop HTN more often than Caucasians, occurs earlier, and is more severe
Family history predisposes the patient to develop HTN
Age: BP increases with age > 35 years old
• Men > 45 yo • Women > 55 yo
Controllable risk factors
Obesity: BMI of 30.0+ more likely to develop HTN
Poor diet: high Na intake, salt sensitivity, low K intake •
ETOH: Heavy and regular consumption can BP
Sedentary lifestyle: Increased likelihood of becoming overweight and developing HTN
Stress: Possible risk factor, difficult to measure, responses to stress (varies from person to person)
Smoking
Consequences of consistently elevated blood pressure
Damage from sustained high blood pressure happens over time
Arteries are damaged from consistent blood flow at high pressure
Cholesterol can form plaques where arteries are damaged
With aging: less flexible, stiffer, and plaque-filled arteries increase the workload of organs and lead to declining function.
declining function OF BODY PART Such as
• Heart • Kidney • Vision • Erectile dysfunction in men • Lower libido in women.
acute events DUE TO HTN are
TIA or Stroke • Heart attack • Angina • PAD: (peripheral arterial disease)claudication