4. HTN Flashcards
normal BP
120/8-0
elevated
120-129/80
stage 1 HTN bp
130-139/80-89
stage 2 HTN bp
> 140/90
HTN means we cannot
perfuse the heart as well
HTN causes
LV hypertrophy
coronary insufficiency
HF
baroreceptors: high pressure zone
sensitive > 60mmHg
aortic arch
carotid sinus
baroreceptors: low pressure zones
large veins
wall of atria
what regulates sympathetic changes
high pressure baroreceptors
what regulates blood volume
low pressure baroreceptors
what contributes to acute and long term volume control
RAAS
angiotensin 2
vasocontriction
incr aldosterone
aldosterone
incr Na+
incr H2O
exretes K+
ADH aka
vasopressing
ADH low doses
reabsoprtion of water
ADH high doses
vasoconstriction
endothelin
vasoconstriction
ANP is secreted by
atrial myocytes
ANP effects
incr GFR
incr Na+ excretion
incr H2O excretion
BNP secreted by
ventricular myocytes
BNP effects
vessel dilation
ANP/BNP prevent
myocardial remodeling/hypertophy
secondary HTN causes in kids
renal disease
coarctation of aorta
secondary HTN adolescnets
coarctation of aorta
secondary HTN young adults
thyroid
fibromuscular dysplasia
renal disease
secondary HTN mid age adults
hyperaldosteronism
thyroid
OSA
cushings
pheochromocytoma
secondary HTN elderly
renal artery stenosis
renal failure
hypothyroidism
HTN pathophysiological effects
vasculopathy
heart disease
cerebrovascular damage
nephropathy
HTN: initial treatment
lifestyle modification
1 kg weight loss =
1 mmHg BP reduction
alcohol BP effect
alcohol incr BP
inhibit ADH
incr renin
reduces med efficacy
HTN: primary line treatment (4)
thiazide diuretics
CCB
ACE inhibitors
ARBS
CCB
amlodipine
verapamil
(DIPINE)
(MIL)
ACE inhibitors
lisinopril
(PRIL)
ARBs
Losartan
(SARTAN)
HTN: secondary treatment
(8)
loop diuretics
aldo antagnoist
b blocker
a blocker
a/b blocker
clonidine
vasodilators
renin inhibitor
loop diuretic
furosemide
aldosterone antagonist
spironolactone
a blocker
zosin
direct renin inhibitor
aliskiren
more drugs means the pt has
less control
drug for pheochromocytoma
a blocker
(ZOSIN(
what drugs taken day of surgery have profound post-induction hyptension
ACE inhibitor (PRIL)
ARBs (SARTAN)
what HTN drug is associated with sedation
clonidine
secondary HTN pnemonic
Cushings
Hyperaldosteronism
Aortic coarctation
Pheochromocytoma
Stenosis of renal arteries
day of surgery: ACE / ARBS
withhold for 10 hours prior
day of surgery: b blocker
take as normal
day of surgery: CCB
take as normal
day of surgery: clonidine
take as normal
which HTN drug has profound rebound if held
clonidine
claudications
plaque build up
carotid bruit indicates
atherosclerotic vascular disease
which pt should you give a fluid bolus to for HTN
pts that took ACE/ARB before surgery
pheochromocytoma signs
flushing
sweating
palpitations
renal artery stenosis signs
renal bruit
hyperaldosteronism sign
hypokalemia
what BP indicates cancellectomy for elective procedures?
> 180/110
HTN causes what risks in surgery
incr EBL
incr MI risk
incr hemodynamic volatility
what should you consider perepping for surgery on HTN pt
additional PIV
type and match
preemptive art line
what drugs help decr BP effects during induction and laryngoscopy
propofol
narcotics
VA
esmolol
phenylephrine
pts with preoperative ______ are more likely to have intraoperative ______
pts with preoperative hyertension are more like to have intraoperative hypotension
induction causes
hypotension
laryngoscopy causes
hypertension
best practice BP range off baseline
+/- 20% of baseline MAP
hypertensive crisis
based on presence of end-organ damage symptoms
hypertensive crisis treatment
sodium nitroprusside
nicardipine
clevidipine
CNS end organ damage
encephalopathy
intracerebral hemorrhage
subarachnoid hemorrhage
acute stroke
renal end organ damage
renal dysfunction
CV end organ damage
unstable angina
MI
HF
aortic dissection
NO prodrugs
NTG
nitroprusside
nicardipine receptor
CCB - DHP
hydralazine receptor
Ca2+ release from SR in arterioles
NTG bolus
10-100 mcg
nipride bolus
dont bolus
nicardipine bolus
0.2-0.5 mg
hydralazine bolus
5-10mg
esmolol bolus
10-50mg
esmolol infusion
25-200mcg/kg/min
NTG infusion
0.1-2 mcg/kg/min
nipride infusion
0.1-2 mcg/kg/min
max NTG infusion
5 mcg/kg/min
max nipride infusion
10 mcg/kg/min
nicardipine infusion
5-15 mg/hr
hydralizine infusion
dont infuse
labetalol bolus
5 mg
labetalol infusion
dont infuse
which anti-HTN drug should you avoid in pts on PDE5 inhibitor
NTG
which anti-HTN drug increases risk of methemoglobinemia
nipride
which anti-HTN drug has reflex tachy?
nicardipine
which anti-HTN drug is slow onset/long acting?
hydralazine
which anti-HTN drug is very potent
hydralazine
what indicates acute postop HTN
> 180/110
what surgeries incr risk of acute postop HTN
carotid endarterectomy
abdominal aortic surgery
radical neck dissection
intracranial surgery
common post op HTN symptoms
pain
anxiety
hypoxemia
hypercarbia
shivering
bladder distention