Htn Flashcards
pre hypertention
130-30/80-89, range are at an increased risk for dev. htn as those with lower values.
how to classify bp
is based on the average of two or more properly measured, seated bp readings each of two or more office visits.
new chatagory prehytn, stages 2 and 3 combined.
individuals at age 55 and have a normotensive bp, have what risk of dev. htn?
90% risk for development of htn
age 40-70, each increment of 20 mmhg in sbp or 10 in dbp, doubles the risk of
cvd across the entire range from 115/75 to 185/115
norm bp?
pre htn?
stage 1?
stage 2?
160/ or >100, d/e, 2 drug combo usually with diuretic, and other.
benefits of lowering bp
35-40% reduction in stroke
20-25% reduction in MI
50% reduction in heart failure
percent of population unaware of htn?
30%
accurate bp measurement
Properly calibrated and validated instrument.
Persons should be seated quietly for at least 5 minutes in a chair (rather than on an exam table), with feet on the floor and arm supported at heart level.
Measurement of BP in the standing position is indicated periodically, especially in those at risk for postural hypotension.
Appropriate size cuff (cuff bladder encircling at least 80 percent of the arm) should be used to ensure accuracy.
three objectives when assessing bp
Assess lifestyle and identify other cardiovascular risk factors or concomitant disorders than my affect prognosis and guide treatment
Reveal identifiable causes of high BP
Assess the presence or absence of target organ damage and CVD.
data needed are acquired through medical history, physical exam, routine lab tests, and other diagnostic procedures.
bp considerations in hx taking
Age at onset, duration, and severity
Onset at younger (< 25 years) or older (> 55 years) age suggests secondary hypertension New-onset, severe hypertension may be secondary
Contributing factors
Significant salt intake, inactivity, psychosocial stress, sleep apnea may contribute to higher blood pressure; some can be addressed separately
Concomitant medications
Common offenders include non-aspirin nonsteroidal anti-inflammatory drugs, oral contraceptives, corticosteroids, licorice, cough/cold/weight-loss sympathomimetics (pseudoephedrine, Ma Huang, ephedrine)
Symptoms suggesting secondary causes
Palpitations or tachycardia, spontaneous sweating, migraine-like headaches in paroxysms (catecholamine excess) Muscle weakness, polyuria (decreased potassium from aldosterone excess)
Personal or family history of renal disease or findings (proteinuria, hematuria) or symptoms such as ankle edema Thinning of skin and stigmata of cortical excess
Snoring and daytime somnolence (sleep apnea) Heat intolerance and weight loss (hyperthyroidism)
Target organ damage
Chest pain or chest discomfort (possible coronary artery disease) Neurologic symptoms consistent with stroke or transient ischemic attack Dyspnea and easy fatigue (possible heart failure) Claudication (peripheral arterial disease)
physical exam
Verify bp in the contralateral arm
Exam the optic fundi
Calculate BMI
Auscultation for carotid, abdominal, femoral bruits, palpation of the thyroid gland; thorough exam of the heat and lungs; exam of the abdomen for enlarged kidneys, masses, and abnormal aortic pulsation; palpation of the lower extremities for edema and pulses; and neurological assessment.
Things to note in the physical examination of hypertensive patients
General appearance, skin lesions, distribution of body fat
Patient may fit criteria for metabolic syndrome (added cardiovascular risk)
Evidence of prior stroke from gait and posture
Rarely, secondary forms are evident as striae (Cushing syndrome) or mucosal fibromas (multiple endocrine neoplasia type II)
Funduscopy
See text for lesion grades
Retinal changes reflect severity of hypertension (target organ damage to the eye) as well as future cardiovascular risk
Examination of neck for thyroid enlargement, carotid bruits
Diffuse multinodular goiter indicating Graves disease Presence of carotid bruits suggests potential stroke risk
Cardiopulmonary examination
Rales and cardiac gallops consistent with target organ damage (heart enlargement or heart failure) Interscapular murmur during auscultation of the back (coarctation of the aorta)
Abdominal examination
Palpable kidneys suggest polycystic kidney disease Mid-epigastric bruits may indicate renal arterial disease
Neurologic examination
Signs of previous stroke (reduced grip, hyperreflexia, spasticity, Babinski sign, muscle atrophy, gait disturbances)
Pulse examination
Delayed or absent femoral pulses may reflect coarctation of the aorta or atherosclerosis
labs/diagnostics for htn
Routine laboratory tests recommended before initiating therapy include and EKG, Urinalysis, blood glucose and hematocrit; serum potassium, creatinine (or the corresponding estimated glomerular filtration rate [GFR]), and calcium; and a lipid profile, after 9-12 hour fast, than includes HDL, LDL, total cholesterol, triglycerides.
Optional tests includes measurement of urinary albumin excretion or albumin/creatinine ratio. More extensive testing for identifiable causes is not indicated generally unless BP control is not