Hypertension Therapeutics Flashcards
Most of the pathophys of HTN involves RAAS, but other factors include ___
natriuretic hormone, peripheral & central nervous systems, sodium\water excretion, nitric oxide etc.
what mathematic equation demonstrates BP?
cardiac output x peripheral resistance
what is cardiac output?
stroke volume and heart rate
what is peripheral resistance?
changes in blood viscosity or change in lumen size of vessesl
why treat HTN?
prolonged HTN leads to organ damage such as CVD, cerebrovascualr disease, retinopathy, renal dysfunction or renal failure and peripheral vascular disease
essential HTN accounts for ___% of cases
90
what is essential HTN?
attributable to internal factors like genetics, that affect sodium, renin, aldosterone, and adrenal steroids
the other 10% of HTN cases is attributable to what factors?
things like excessive alcohol use, high sodium intake, NSAIDs, corticosteroids, anabolic steroids, oral contraceptives, oral decongestants, renal dysfunction, obstructive sleep apnea, stimulants etc.
___% of Canadians aged 20-79 are diagnosed with HTN
23
____% of Canadians aged 60-79 with HTN is
51
____% of Canadians aged 40-59 have HTN
22
____% of patients with HTN are unaware
29
which sex has a higher prevalence of HTN?
male
high BP on a home monitor
135/85 +
high BP on an automated office monitor
135/85+
high BP on a non-automated office monitor
140/90 +
high BP on an ambulatory monitor
mean awake 135/85+; mean 24hr 130/80+
what is masked HTN?
when BP is lower in the office setting, but higher at home
what is the target systolic BP for isolated systolic HTN?
<140 SBP
what is the target BP in diabetic pts?
<130/80
what is the target BP in pts at high risk for CV events?
<120 SBP
what are the high risk factors for CV events?
age 75+, presence of clinical of subclinical CVD or FRS >15%, CKD
what are the 3 common thiazide and thiazide-like diuretics?
HCTZ, chlorthalidone, indapamide
what is a minor inconvenience of chlorthalidone?
there are not many strengths available, so you may need to half or quarter tablets to get the prescribed dose
thiazides are C\I in what condition?
gout (causes increase in uric acid and can cause gout exacerbations)
there is some controversy over whether thiazides cross react with an allergy to what class of medication?
sulpha
what are some of the notable ADRs of thiazides?
decreased Na and K, increased blood glucose, increased uric acid, increased lipids, photosensitivity, frequent urination
what is a concern related to the photosensitivity caused by HCTZ?
has been some evidence to suggest it may increase risk for non-melanoma skin cancer
what monitoring needs to be done with thiazide and when?
same baseline tests as with all HTN therapy & electrolyte 1-2 weeks after starting or changing dose and the Q6-12 months once stable
give 3 examples of combination diuretics
- aldactazide (HCTZ & spironalactone)
- Triazide (HCTZ & triamterene)
- moduret (hctz & amiloride)
what type of diuretic is triamterene?
K sparing
list 10 ACE-Is mentioned in lecture
Benazepril captopril cilazapril enalapril fosinopril lisinopril perindopril quinapril ramipril trandolapril
what is the basic overview of the MOA of ACE-Is?
inhibit teh conversion of angiotensin 1 to angiotensin 2, which will cause a decrease in aldosterone and decreased vasoconstriction
how are ACE-I used in the black population?
not as effective unless combined with HCTZ, but still used for compelling indications like MI, diabetes, renal Dx and HF
what are some of the notable ADRs of ACE-Is?
cough, angioedema, increased K and SCr, dizziness
what should be monitired on ACE-I and when?
baseline thinsg that are measured for every HTN patient; K and SCr 1-2 weeks after starting and dose changes, the q 6-12 months once stabel
ACE-Is should be used with caution when combined with what other medications?
K sparing diuretics, lithium, NSAIDS, K supplements