Hypertension Flashcards
risk factors of hypertension
- smoking
- obesity
- poor diet
- stress
- sedentary lifestyle
- male gender
clinical manifestation of hypertension
- fatigue
- dizziness
- headache
- palpitations
- dyspnea
- chest pain – angina
causes of hypertension
- primary = unknown
- secondary = specific cause
complications of hypertension
- atherosclerosis/CAD
- left ventricular hypertrophy
- heart failure
- stroke/TIA
- hypertensive encephalopathy
- peripheral vascular disease
- nephrosclerosis
- retinopathy/retinal hemorrhage
labs and diagnostics for hypertension
- lipid panel
- urinalysis
- CBC
- BMP
- liver function
- EKG/ECG
- echocardiogram
- serum uric acid Ca/Mg
- TSH levels
- eye exams
goals for hypertension
- achieve and maintain goal BP
- reduce CV risk factors and target organ disease
- lifestyle modifications = exercise, manage BP, manage cholesterol, decrease blood sugar, better diet, stop smoking
- lose weight – DASH eating plan, dietary sodium reduction, moderation of alcohol intake, physical activity
- avoid tobacco products
- management of risk factors
- activate SNS and stress hormones
- screen frequently for risk factors
beta blockers
- decrease SNS stimulation
- work centrally on vasomotor center and peripherally to inhibit NE release
- block adrenergic receptors on blood vessels
ACE inhibitors
- prevent conversion of angiotensin I to II
- reduce vasoconstriction and sodium and water retention
A-II receptor blockers
prevent angiotensin II from binding to receptors in blood vessel walls
Calcium Channel blockers
increase sodium excretion and cause arteriolar vasodilation by preventing the movement of extracellular Ca into cells
Diuretics
reduce plasma volume
Common side effects of hypertension
- orthostatic hypotension
- sexual problems
- dry mouth
- frequent voiding
Resistant Hypertension
- failure to reach goal BP with appropriate therapy and drug regimen; increased risk of MI or stroke
how to take accurate BP
- no caffeine, nicotine, or exercise 30 minutes prior
- rest quietly for 5 minutes prior
- proper size and location of cuff
- position arm at heart level
- use auscultatory method
- take BP in both arms and note difference
orthostatic HTN
- BP and HR after supine for 5 minutes
- Assist to standing
- Measure BP and HR at 1 minute and 3 minutes of position change
- Normal: SBP decreased (less than 10 mmHg, DBP and HR increased slightly
- Abnormal:
- SBP decreased 20 mmHg or more
- DBP decreased 10 mmHg or more
- HR increased 20 beats or more
- Report of lightheaded or dizzy
Reasons for poor adherence
- inadequate education
- low health literacy
- unpleasant side effects
- stop taking medication
- increased cost
- lack of insurance
measures to enhance compliance
- individualize care plan
- active patient participation
- select affordable drugs
- involve caregivers/family
- combination drug
- patient teaching
evaluate the effectiveness of treatment
- meet goal BP
- understand treatment plan
- reports minimal side effects of drug
age-related physical changes contribute to HTN
- Loss of elasticity of artery
- Increased collagen and stiffness in myocardium
- Increased peripheral vascular resistance
- Decreased adrenergic receptors
- Blunted baroreceptor reflex
- Decreased renal function
- Decreased renin responds to Na/H20 depletion
Hypertensive crisis
- SBP greater than 180 mmHg or DBP greater than 120 mmHg
Hypertensive emergency
- target organ damage
- requires hospitalization
- severe problems:
1. encephalopathy
2. stroke
3. MI
4. renal failure
5. retinopathy
6. aortic aneurysm
7. intracranial/subarachnoid hemorrhage
Hypertensive emergency
- target organ damage
- requires hospitalization
- severe problems:
1. encephalopathy
2. stroke
3. MI
4. renal failure
5. retinopathy
6. aortic aneurysm
7. intracranial/subarachnoid hemorrhage
Hypertensive urgency
- no evidence of target organ disease
- hospitalization not required
- associated with chronic stable disorders = CHF, CVA, angina
Clinical manifestations of hypertensive episodes
- hypertensive encephalopathy – nausea, seizures, confusion, trauma, retinal changes, vomiting
- renal insufficiency
- cardiac decomposition – chest pain, MI, pulmonary edema, dyspnea, unstable angina, heart failure
- aortic dissection – chest and back pain, reduced/absent pulses