Hypertension lec notes Flashcards
Long term risks for having uncontrolled hypertension:
heart disease
stroke
kidney disease
Most common form of hypertension is ___________
essential hypertension (unknown cause),
- also called primary hypertension
What are the Key drugs that can increase blood pressure?
Amphetamines and ADHD drugs/stimulants
cocaine
decongestants
erythropoiesis-stimulating agents (epogen, arinaspt) * remember these drugs increase red blood cell production. So will increase the viscosity of the blood. Causing increased blood pressure.
immunosuppressants (cyclosporine)
NSAIDs
systemic steroids
(increase Na and H2O retention which is going to increase blood volume and correspondingly increase blood pressure)
what drugs makes this individual’s blood pressure elevated?
keep in the back of your mind for NAPLEX questions
(RAAS) Renin Angiotensin Aldosterone System
(SNS) Sympathetic Nervous System
2 primary neural hormonal systems
Renin is released from the ___________
kidneys
Angiotensin I is converted to Angiotensin II via the ________
Angiotensin Converting Enzyme
Renin is responsible for ______________
the conversion of Angiotensinogen to Angiotensin I
Angiotensinogen is released by ____________
the liver
What class of medications do we have to inhibit the conversion of angiotensinogen to angiotensin I ?
give an example of drug
Renin inhibitors
Tekturna (aliskiren)
*However not really used for HTN today because ______
What class of medications do we have to inhibit the conversion of angiotensin I to angiotensin II? which also results in what?
give example of medications
ACE-inhibitors
decreased vasoconstriction and decreased secretion of aldosterone.
lisinopril
What class of medications do we have that block angiotensin II from binding at the receptor level to angiotensin II type-1 (AT1) receptors on vascular smooth muscle, which prevents vasoconstriction and prevents the release of aldosterone?
give an example of medication
(ARBs) Angiotensin Receptor Blockers
losartan
what role does Aldosterone play?
causes increased reabsorption of Na and H2O in the kidneys, this increases blood volume, and in turn increases blood pressure.
What medication class also prevents the breakdown of Bradykinin?
What happens as a result?
What is the role of Bradykinin?
ACE-inhibitors
Bradykinin levels increase, which is thought to contribute to the vasodilatory effects and Side Effects of a dry and hacking cough.
Bradykinin is a vasodilator, which decreases SVR.
What class of medications do we use to compete with aldosterone at receptor sites in the distal convoluted tubule and collecting ducts of the nephron in order to increase the excretion of water and Na but to preserve potassium?
Potassium Sparing Diuretics “aldosterone receptor antagonists”
Which potassium sparring diuretic is a non-selective receptor antagonist?
spironolactone
Which potassium sparring diuretic is a selective receptor antagonist?
eplerenone
What class of medications inhibit Na reabsorption in the distal convoluted tubules of the nephron and cause increased excretion of Na, Cl, H20 and K?
give an example of medication
thiazide type diuretics
hydrochlorothiazide
The (SNS) Sympathetic Nervous System releases catecholamines (like NE & Epi) into the blood stream which go on to stimulate adrenergic receptors and cause an increase in blood pressure. What classes of medications do we use to block stimulation of adrenergic receptor stimulation?
Give examples of medications in class
Centrally-acting alpha-2 agonist
ex. clonidine-prevents the release of NE
Beta Blockers
alpha-1 receptors when stimulated cause vasoconstriction
Beta-1 receptors when stimulated causes increased HR and contractility
Beta-2 receptors when stimulated causes
In terms of diagnosing blood pressure, there are 4 categories: Define each
1)
2)
3)
4)
1) Normal BP = SBP < 120 mmHg AND DBP < 80 mmHg
2) Elevated BP = SBP 120-129 AND DBP < 80mmHg
3) Stage 1 HTN = SBP 130-139 ooooorrrrr DBP 80-89 mmHg
4) Stage 2 HTN = SBP > or = 140 mmHg ooooorrrr DBP > or = 90 mmHg
What are the Lifestyle Management interventions which are key to prevent HTN and help Tx HTN in conjunction with medications??
-Weight loss (1kg of weight loss decreases BP by ~1mmHg)
-Heart-healthy diet (DASH diet) = a diet high in fruits, vegetables, fiber, and low-fat dairy products and low in saturated fats & sugar
-reduce sodium intake to <1500 mg daily
-smoking cessation
-control blood glucose and lipids to decrease cardiovascular disease risk
What are some Natural Products that have some evidence for reducing blood pressure and overall cardiovascular risk, although they are not recommended by guidelines?
fish oil
coenzyme Q10
L-arginine
garlic
patients however should be advised that fish oil and garlic increase bleeding risk
What are the four preferred drug classes for treating Hypertension?
ACE inhibitors
ARBs
DHP CCBs
thiazide diuretics
Treatment Principles (ACC/AHA)
Hypertension Treatment Guidelines
When to start hypertension treatment?
If patient has a SBP > or = to 140mmHg or DBP > or = to 90 mmHg (Stage II hypertension
If a patient has SBP 130-139 mmHg or DBP 80-89 mmHg
AND
Clinical CVD OR ASCVD risk > or = to 10%
*clinical CVD “cardiovascular disease” = stroke, heart failure, coronary heart disease, history of MI
Treatment Principles (ACC/AHA)
Hypertension Treatment Guidelines
What is blood pressure goal for all patients?
< 130/80 mmHg (all patients)
The ADA recommends a goal BP < 130/80 mmHg for patients with diabetes and patients with high ASCVD risk.
A BP < 140/90 mmHg for patients at lower risk.
The KDIGO guideline recommends a goal SBP <120 mmHg for patients with hypertension and chronic kidney disease (CKD)
Treatment Principles (ACC/AHA)
Hypertension Treatment Guideline
Initial Drug Selection for black patients with hypertension
which drugs do we choose from 1st?
thiazide diuretics or DHP CCBs
Treatment Principles (ACC/AHA)
Hypertension Treatment Guidelines
Initial Drug Selection
what drugs do we initially want to select in patients?
DHP CCB
ACE inhibitors OR an ARBs
thiazide diuretics
** But we DO NOT want to use ACE inhibitors and ARBs together**
Treatment Principles (ACC/AHA)
Hypertension Treatment Guidelines
Initial Drug Selection for patients who have albuminuria.
what drugs classes should we initially choose from to treat hypertension in a patient who has albuminuria??
ACE inhibitor or ARB
Treatment Principles (ACC/AHA)
Hypertension Treatment Guidelines
Initial Drug Selection
what drug classes should we initially choose from to treat hypertension in a patient who has CKD?
Define CKD parameters.
ACE inhibitor or ARB
CKD = GFR < 60mL/min
or
albuminuria (urine albumin > or = 300mg/day)
or
albumin: creatine ratio > or = 300mg/g
Treatment Principles (ACC/AHA)
Hypertension Treatment Guidelines
Initial Drug Selection
what drug classes should we initially choose from to treat hypertension in a patient who has diabetes + albuminuria?
ACE inhibitor or ARB
If there is No albuminuria, then can select from any of the 4 preferred drug classes
When would we want to start two drugs in patient to treat there hypertension?
If there blood pressure is > 150/90 mmHg
Define Clinical CVD (cardiovascular disease)
Define Clinical ASCVD (atherosclerotic cardiovascular disease)
Define CAD (coronary artery disease)
Define PAD (peripheral arterial disease)
Pregnancy and hypertension
which drug classes for hypertension are Contraindicated in pregnancy?
ACE inhibitors
ARBs
Renin inhibitor, aliskiren
All have boxed warnings for fetal toxicity
What are some indicators on a patient exam that would imply one is pregnant?
HCG+ test would indicate the patient is pregnant
What are the drugs of Choice in pregnancy when required to treat high blood pressure?
labetalol, nifedipine ER, methyldopa,
chronic hypertension:
hypertension that develops before pregnancy
gestational hypertension:
hypertension that develops during pregnancy
Preeclampsia:
occurs after week 20 of the pregnancy and is evident by elevated blood pressure and proteinuria in the majority of cases.
When should pregnant patients receive drug treatment for chronic hypertension?
What should the BP be maintained at?
If SBP > or = 160 mmHg OR DBP > or equal to 105 mmHg
BP should be maintained between 120-160 mmHg systolic AND 80-110 mmHg diastolic
For Treating Chronic Hypertension what is the Goal BP to be maintained?
Maintained SBP 120-160 mmHg AND DBP 80-105
Thiazide Type Diuretics
Indications:
MOA:
Contraindications:
Warnings:
Side Effects:
Monitoring:
Pearls/Notes:
Drug-Drug/Food interactions:
MOA: drugs inhibit Na and water reabsorption in the distal convoluted tubules of the nephrons. So there is increased excretion of Na/Cl/H2O/K
Contraindications: Hypersensitivity to sulfonamide-derived drugs,
Sulfonamide-derived drugs
Warnings:
Side effects: decrease K/Mg/Na (hypokalemic/hypomagnemic)
increased retention of Uric acid/ Blood glucose/ TG/LDL/HCO3/Ca
do increase uric acid so be cautious in patients with gout
thiazide type diuretics retain Calcium, so good for bones, Loop diuretics primary used for HF excrete calcium, so bad for bones and can cause osteoporosis.
photosensitivity/impotence (inability to keep an erection)
Monitoring: electrolytes/renal function/
Note/Pearls: Take early in the day to avoid nocturia
** Not effective if CrCl < 30mL/min**
Drug-Drug Interactions:
we want to look for additive effects in electrolyte losses.
in combination with NSAIDs can be problematic, Drugs that can cause sodium and water retention (NSAIDs) can decrease the effectiveness of antihypertensive medications.
Can decrease lithium renal clearance and increase risk of lithium toxicity. Do NOT use in combination if possible.
There is one Thiazide-type diuretic that is available IV, which one?
chlorothiazide (Diuril)
Dihydropyridine Calcium Channel Blockers (DHP CCBs)
Indications:
Dosing:
MOA:
Contraindications:
Warnings:
Side effects:
Monitoring:
Note/Pearls:
Drug-Drug Interactions:
Indications: hypertension/chronic stable angina/Prinzmetal’s angina
MOA: work more at peripheral vascular smooth muscle than myocardial cells, inhibiting Ca ions from entering. This causes peripheral arterial vasodilation and coronary artery vasodilation.
Contraindications:
Warnings:
Side effects: reflex tachycardia, headache, flushing, peripheral edema, palpitations, gingival hyperplasia (overgrowth of gums)
Monitoring:
Note/Pearls:
Drug-Drug Interactions:
Which Calium Channel Blocker comes as a lipid emulsion preparation?
How many calories does this provide to patient if given?
What is the maximum time of use after vial has been punctured and why?
Clevidipine (Cleviprex)
-provides 2kcal/mL, and is a milky white in color
-it is more prone to bacterial overgrowth since it is an emulsion, strict aseptic technique required and once vial is punctured is only good for 12 hours.
Which Calcium Channel Blocker is the safest to use if one is needed in HFrEF?
amlodipine (Norvasc)
Which Calcium Channel Blocker is the drug of choice in Pregnancy?
Nifedipine ER (Adalat CC, Procardia XL)
Which Calcium Channel Blocker has a Warning not to use for Chronic Hypertension or acute BP reduction in non-pregnant adults due to profound hypotension that has results in MI & death?
Nifedipine IR (Procardia)
Which Calcium Channel Blocker has the Contraindication for patients that have an allergy to soybeans/soy products/or eggs?
Clevidipine (Cleviprex)
is an emulsion, so remember can increase TGs
Which Calcium Channel Blockers are available IV?
Nicardipine IV (Cardene IV) & Clevidipine (Cleviprex)
Non-Dihydropyridine Calcium Channel Blockers (non-DHP CCBs)
Indications:
Dosing:
MOA:
Contraindications:
Warnings:
Side effects:
Monitoring:
Note/Pearls:
Drug-Drug Interactions:
Indications: primarily used to control HR in certain arrhythmias (atrial fibrillation) and are sometimes used for hypertension and angina.
MOA: work at peripheral vascular smooth muscle but primarily are more selective for the myocardium (myocardial cells) then the DHP CCBs. They inhibit Ca ions from entering cardiac smooth muscle. However, the decrease in BP produced is due too negative inotropic (decreased force of ventricular contraction) AND negative chronotropic (decreased HR) effects.
Avoid in HFrEF
Contraindications:
Warnings: Heart Failure (may worsen symptoms), bradycardia, increased LFTs
Side effects: edema/constipation (more with verapamil)/gingival hyperplasia (more than the DHP CCBs)
Monitoring:
Note/Pearls:
IV:PO conversions are NOT 1:1
Not All generic products are therapeutically equivalent to the Brand-name products.
Drug-Drug/Food Interactions:
Use caution with other drugs that decrease HR, including beta-blockers, digoxin, clonidine, amiodarone, and dexmedomidine (Precedex)
Do NOT use with grapefruit juice
negative inotropic:
negative chronotropic: