hypertension - schreiber Flashcards
stage 2 HTN
systolic > 160
D: > 100
in essential HTN you often have
both systolic and diastolic BP elevated
who gets 2x more HTN than whites
Non hispanic blacks, 5-18x ESRD increased risk
MAP =
SVR x CO
most patients with hypertension have
INCREASED SVR
what changes do NO and endothelin undergo in hypertensive patients?
reduced NO activity maybe due to oxidative stress and AT2
Elevated levels of endothelin
why do hypertensive patients fail to excrete more Na to lower BP?
less nephrons
- activated SNS and RAAS
2 reasons why increased BP leads to more vasoconstriction
organ perfusion -
Na/K atpase inhibitor to get rid of salt but vasoconstricts
in sustained hypertension what does increased SVR lead to
structural vessel changes -
hypertrophy and hyaline arteriosclerosis
secondary HTN can be due to
renal parenchymal disease endocrine drug - OSA coarctation of aorta
when do you suspect RAStenosis
- young patient with HTN
- old person with diastolic HTN
- refractory HTN
3 clues for endocrine causes of secondary HTN
- hypokalemia
- headache, sweating, palpitations
- Cushinoid features
coarctation of the aorta results in
hypertension in the arms
hypotension in the legs
drugs that can cause secondary HTN
- licorice!
- cocaine
- EtOH
- NSAIDs, steroids, exogenous Epo
every 20/10 increase in BP after 115/75
double risk for CV disease