Hypertension lec notes Flashcards
(140 cards)
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