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Spring Therapeutics Exam #2 - Hypertension
n/a
90
Health Care
Graduate
04/11/2010

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Cards

Term
Prevalence of HTN
Definition
Older > younger;
Men > women if <45 yrs old;
Men = women b/w 45-55 yrs old;
Men < women if >55 yrs old;
African Americans > Caucasians > Mexican Americans;
Term
Hypertension (HTN)
Definition
persistent, elevated arterial blood pressure
Term
Mean Arterial Pressure (MAP)
Definition
= 1/3 * SBP + 2/3 * DBP;
average pressure through cardiac cycle
Term
Blood Pressure (BP)
Definition
= CO x TPR
Term
Cardiac Output (CO)
Definition
determines SYSTOLIC BP;
Determined by: stroke volume, heart rate, venous capacitance
Term
Total Peripheral Resistance (TPR)
Definition
determines DIASTOLIC BP;
determined by:
contraction, dilation of arterioles
Term
Essential HTN = Primary HTN
Definition
NO IDENTIFIABLE cause;
90-95% of all cases
Term
Secondary HTN
Definition
HTN with an identifiable cause;
Renal: increased renin secretion due to stenosis or decreased perfusion from inflammatory or fibrotic changes in renal vessels;
Endocrine: primary aldosteronism, Cushing's syndrome, pheochromocytoma;
Vascular: narrowing/constricting of aorta;
Pregnancy: increased estrogen;
Drug-induced: corticosteroids, OCPs/estrogen, alcohol, amphetamines, NSAIDs, cylcosporine & tacrolimus (calcineurin inhibitors), decongestants, eryhtropoiesis stimulating agents (eryhtropoietin, darbapoietin), thyroid hormone excess, cocaine, ephedra, anabolic steroids
Term
Normal Blood Pressure
Definition
<120/80
Term
Prehypertension
Definition
SBP: 120-139; OR
DBP: 80-89;
Term
Stage 1 HTN
Definition
SBP: 140-159; OR
DBP: 90-99;
Term
Stage 2 HTN
Definition
SBP: > or = 160; OR
DBP: > or = 100;
Term
Isolated Systolic HTN (ISH)
Definition
SBP > or = 140 and DBP <90;
More common in elderly;
Result of decreased flexibility of arterial wall;
Term
"White Coat" HTN
Definition
rise in BP within medical setting - returns to normal within a few hrs of leaving;
Occurs in approx. 15-20% of pts;
More likely to occur in young, female pts;
Home BP monitoring may be useful
Term
Major Risk Factors for CVD
Definition
HTN, smoking, obesity (BMI > 30), physical inactivity, dyslipidemia, diabetes mellitus, microalbuminuria OR GFR <60 mL/min, Age (>55 men, >65 women), family hx of premature dx (Male relative <55 yrs, female relative <65 yrs)
Term
RISK of CVD in pts w/ HTN determinants
Definition
BP;
presence or absence of risk factors for CVD;
presence or absence of target organ damage
Term
Target Organ Damage/Disease that can cause CVD
Definition
heart diseases: LVH, angina/prior MI, CABG (bypass), HF;
Brain: stroke, transient ischemic attack;
Nephropathy: SCr > or = 1.5 (males) or 1.3 (females), proteinuria & microalbuminuria;
Peripheral arterial dx: absence of 1 or more major pulses in extremities w/ or without intermittent claudication, anuerysm, carotid artery stenosis
Term
Goals of HTN Therapy
Definition
prevent morbidity & premature morbidity;
decrease cardiovascular risk;
prevent or reverse end-organ damage;
attain target BP goal;
minimize adverse effects & drug toxicity
Term
CAD prevention BP Goal
Definition
< 140/90
Term
Diabetes, Kidney Dx, CAD (angina, NSTEMI or STEMI - MI), CAD risk equivalents (PAD, AAA, carotid artery dx), high CAD risk (>10-20% Framingham), HF Goal BP
Definition
< 130/80
Term
Non-pharm Tx of HTN
Definition
recommend for ALL pts;
Use as adjunctive therapy for pts on medications;
Lifestyle Modifications:
- lose weight (if overweight), limit EtOH intake, increase aerobic physical activity, reduce sodium intake, diet modifications (fruits, veggies, low-fat dairy, decreased sat./total fat), stop smoking, reduce intake of dietary saturated fat & cholesterol
Term
Average Decrease in SBP w/ Weight Reduction
Definition
Decreases 5-20 mmHg/10 kg weight loss
Term
Average Decrease in SBP with Moderate Alcohol Consumption
Definition
Decreases 2-4 mmHg
Term
Average Decrease in SBP with Sodium Restriction
Definition
Decreases 2-8 mmHg
Term
Average Decrease in SBP with DASH Eating Plan
Definition
Decreases 8-14 mmHg
Term
Average Decrease in BP with Physical Activity
Definition
Decrease 4-9 mmHg
Term
Thiazide-type diuretics
Definition
1st line drug therapy, unless compelling indications;
Term
If SBP >20 mmHg or DBP >10 mmHg above goal:
Definition
INITIATE drug therapy with 2 drugs (1 should be thiazide diuretic); combo products may be useful
Term
Initial Drug Choices for Stage 1 HTN without Compelling Indications
Definition
Start with thiazide diuretic alone; ACE-I, ARB, CCB are also all valid alternatives
Term
Initial Drug Choices for Stage 2 HTN (or >20/10 over goal) without Compelling Indications
Definition
Start with 2 drug combination (generally one is a thiazide diuretic)
Term
Preferred Therapy for HTN w/ CAD prevention (no compelling indication, BP Goal = <140/90)
Definition
ACEI, ARB, CCB, thiazide OR combo
Term
Preferred Therapy for HTN w/ High CAD Risk or CAD Risk Equivalents (Goal BP = <130/80)
Definition
ACE-I, ARB, CCB, thiazide, OR combo
Term
Preferred Therapy for HTN w/ Renal Disease (BP Goal: <130/80 or <125/75)
Definition
ACE-I OR ARB
Term
Preferred Therapy for HTN with CAD: Angina, MI (BP Goal: <130/80)
Definition
Beta-blocker +/- ACE-I or ARB
Term
Preferred Therapy for HTN with Heart Failure (Goal BP: <130/80 or optional: <120/80)
Definition
Beta-Blocker +/- ACE-I or ARB +/- diuretic +/- aldosterone antagonist (Class III or IV only)
Term
Preferred Therapy for HTN with Diabetes Mellitus (Goal BP = <130/80)
Definition
ACE-I or ARB
Term
Pros of Thiazide & Thiazide-like diuretics (hydrochlorothiazide, metolazone, chlorthalidone)
Definition
literature-based evidence of decreased morbidity & mortality;
effective;
low-cost;
may be of benefit in salt-sensitive pts, especially African-Americans;
Term
Adverse Effects of Thiazide Diuretics
Definition
volume depletion, frequent urination;
decreased K, Mg, Na levels;
increased uric acid levels (caution w/ gout pts);
increased Ca levels;
sexual dysfunction;
photosensitivity/rash - recommend sunscreen;
Term
Thiazide diuretics
Definition
Used as 1st line therapy;
recommended agent of choice when combo therapy is needed;
diuretic of choice for HTN w/ normal renal fcn (NOT useful if CrCl <30 mL/min;
Term
Pros of Loop Diuretics (furosemide, bumetanide, torsemide, ethacrynic acid)
Definition
literature-based evidence of decreased morbidity & mortality;
low-cost; useful in pts w/ CrCl <30 mL/min;
may be of benefit in salt-sensitive pts, including African-Americans;
Term
Adverse Effects of Loop Diuretics
Definition
volume depletion, frequent urination;
decreased K, Mg, Na;
increased uric acid levels (caution in gout pts);
decreased Ca levels;
photosensitivity/rash (sunscreen);
tinnitus or loss of hearing (high doses);
Term
K-Sparing Diuretics (amiloride, spironolactone, triamterene)
Definition
weak antihypertensive agents when used alone - better if used in combination;
Effective in combo to prevent HYPOkalemia;
ADRs: increased K, uric acid levels (HYPERkalemia, Gout), gynecomastia, irregular menses;
Term
Drug Interactions of Diuretics
Definition
decreased effect w/ NSAIDs, steroids; increased Li levels
Term
Monitoring Parameters of Diuretics
Definition
BP; BMP-7, especially SCr, electrolytes [K], Mg; Weight; Uric Acid
Term
Patient Education for Diuretics
Definition
1) Increased frequency & urgency of urination;
2) May cause thirst & dry mouth --> use sugarless hard candy;
3) Sodium restriction is important
Term
hydrochlorothiazide (Microzide)
Definition
thiazide diuretic;
Dose: 12.5 - 25 mg;
Daily Frequency: 1
Term
furosemide (Lasix)
Definition
loop diuretic;
Dose: 20-80 mg;
Daily Frequency: 1-2
Term
Triamterene/Hydrochlorothiazide (Dyazide)
Definition
potassium-sparing diuretic/thiazide diuretic combo;
Dose: 37.5-75 mg/25-50 mg;
Daily Frequency: 1
Term
Beta-Adrenergic Blockers (atenolol, bisoprolol, metoprolol, nadolol, nebivolol, propanolol, timolol)
Definition
MoA: decrease in CO due to decrease in HR & contractility, reduction in renin activity, inhibition of NE release;
PROS:
- lit.-based evidence of decreased morbidity & mortality;
- first line: post-MI (CAD), angina;
- useful in heart failure;
- beneficial for pts w/ migraines, essential tremor, anxiety;
Term
Adverse Effects of Beta-Blockers
Definition
bradycardia;
exercise intolerance;
bronchospasm;
glucose intolerance;
sexual dysfunction;
masks symptoms of hypoglycemia (except sweating);
Term
acebutalol, pindolol (ISA - intrinsic sympathomimetic activity)
Definition
beta-blockers that have partial Beta-agonist activity (ISA) and should be AVOIDED when treating HTN
Term
carvedilol, labetalol (alpha/beta-blocker)
Definition
combined alpha/beta-blockers that cause peripheral vasodilation and can cause MORE HYPOtension
Term
metoprolol, propanolol
Definition
more lipid soluble beta-blockers that cause more CNS adverse effects (i.e. depression);
increases nitric oxide;
also undergoes extensive first-pass metabolism
Term
atenolol, nadolol
Definition
beta-blockers that increase nitric oxide;
also excreted RENALLY
Term
Drug Interactions with Beta-Blockers
Definition
concomitant non-dihydropyridine CCBs may lead to heart block;
concomitant sympathomimetics (cocaine, amphetamines) cause unopposed alpha vasoconstriction
Term
Monitoring Parameters for Beta-Blockers
Definition
BP, HR
Term
Patient Education for Beta-Blockers
Definition
do NOT abruptly D/C: tachycardia, aggravation of angina, death;
educate pts w/ diabetes of masking effect of hypoglycemia
Term
atenolol (Tenormin)
Definition
cardioselective beta-blocker (B1>>>B2);
Dose: 25-100 mg once daily
Term
metoprolol tartrate (Lopressor)
Definition
cardioselective beta-blocker (B1>>>B2);
Dose: 50-200 mg twice daily;
Term
metoprolol succinate (Toprol XL)
Definition
cardioselective beta-blocker (B1>>>>B2);
Dose: 50-200 mg once daily;
Term
carvedilol (Coreg)
Definition
mixed alpha/beta blockers;
Dose: 12.5-50 mg twice daily
Term
Angiotensin-Converting Enzyme Inhibitors (ACE-Is) - benazepril, captopril, enalapril, lisinopril
Definition
Used as 1st line agents for HTN;
MoA: inhibits ACE --> decreases formation of Angiotensin II --> decreased vasoconstriction; also decreases aldosterone production;
Pros:
- slows progression of DIABETIC nephropathy;
- decreased morbidity & mortality in HF & acute-MI;
Term
Adverse Effects of ACE-Is
Definition
non-productive, dry cough;
hyperkalemia;
angioedema (more common in African-Americans & smokers);
acute renal failure (RARE);
Term
Absolute Contraindications for ACE-Is
Definition
bilateral renal artery stenosis;
pregnancy
Term
Hyperkalemia due to ACE-Is
Definition
seen in pts w/: renal dx, diabetes, concimitant use of NSAIDs, K supplements, K-sparing diuretics, aldosterone antagonists, ARBs, direct renin inhibitors;
Term
Drug Interactions with ACE-Is
Definition
NSAIDs may DECREASE efficacy;
May increase Li levels;
Caution w/ use of K-supplements
Term
Monitoring Paramters for ACE-Is
Definition
BP;
BMP-7, especially SCr, electrolytes (K);
Cough;
Angioedema;
Term
benazepril (Lotensin)
Definition
ACE-I
Dose: 10-40 mg daily or BID
Term
lisinopril (Prinivil, Zestril)
Definition
ACE-I;
Dose: 10-40 mg daily
Term
ramipril (Altace)
Definition
ACE-I;
Dose: 2.5-10 mg daily or BID
Term
Angiotensin-II Receptor Blockers (ARBs) - candesartan, losartan, valsartan
Definition
MoA: inhibits ALL Ang-II receptors;
Pros: slows progression of diabetic nephropathy, beneficial in HF;
ADRs: similar to ACE-Is but LESS incidence of cough;
CAN be given to pts w/ hx of ACE-I-induced angioedema if: mild-moderate rxna AND compelling indication;
Term
losartan (Cozaar)
Definition
ARB;
Dose: 50-100 mg daily or BID
Term
valsartan (Diovan)
Definition
ARB;
Dose: 80-320 mg once daily
Term
losartan/hydrochlorothiazide (Hyzaar)
Definition
combination ARB/thiazide diuretic;
Dose: 50/12.5 - 100/25 mg once daily
Term
aliskirin (Tekturna)
Definition
MoA: direct renin inhibitor;
Pros: additional option for BP control;
ADRs: diarrhea, cough, angioedema, anemia, hyperkalemia, creatine kinase increases;
C/I'd in pregnancy;
Drug Interactions: metabolized by 3A4 - irbesartan decreases, atorvastatin increases;
Monitoring Parameters:
-BP, BMP (K, SCr), cough, angioedema, diarrhea
High fat meals may reduce absorption;
Dose: 150-300 mg daily
Term
non-dihydropyridine CCBs - diltiazem, verapamil
Definition
MoA: decrease HR, slow AV nodal conduction;
Pros: efficacious, useful in pts w/ tachycardia & atrial fibrillation, MAY delay onset of diabetic nephropathy, no changes in lipid panel;
ADRs: bradycardia, 1st-degree heart block, negative inotropic effects, constipation, anorexia;
Use w/ caution w/ Beta-blockers --> heart block; Avoid in systolic HF;
Different formulations are NOT interchangeable;
Monitoring Parameters: BP, HR, constipation;
Pt Education: constipation management (increase fluid intake, high fiber diet, regular exercise);
Term
diltiazem SR (Cardizem SR)
Definition
non-dihydropyridine CCB;
Dose: 180-360 mg BID
Term
diltiazem SR (Cardizem CD, Cartia XT)
Definition
non-dihydropyridine CCB;
Dose: 120-480 mg once daily
Term
verapamil SR (Calan SR)
Definition
non-dihydropyridine CCB;
Dose: 180-480 mg once daily or BID
Term
dihydropyridine CCBs (amolidipine, felodipine, nifedipine, nicardipine, isradipine)
Definition
Pros: efficacious, no changes in lipid profiles, effective in pts w/ ISOLATED SYSTOLIC HTN, drug of choice for blood pressure control in COMBO therapy when pt is already on beta-blocker;
ADRs: HA, tachycardia (especially IR), peripheral edema, flushing;
Long-acting preferred over short-acting;
Avoid in systolic HF;
Monitoring Parameters: BP, HR, peripheral edema;
Patient Education: peripheral edema, do not crush or chew SR products, avoid large qts of grapefruit juice
Term
amlodipine (Norvasc)
Definition
dihydropyridine CCB;
Dose: 2.5-10 mg once daily
Term
felodipine (Plendil)
Definition
dihydropyridine CCB;
Dose: 5-20 mg once daily;
Term
alpha-1 blockers (prazosin [Minipress], doxazosin [Cardura], terazosin [Hytrin])
Definition
MoA: inhibit uptake of catecholamines in smooth muscle & cause vasodilation;
Pros: beneficial in pts w/ BPH;
ADRs: "first dose" syncope, postural hypotension, tachycardia, edema due to Na/H2O retention w/ chronic admin.;
DO NOT use as initial 1st line therapy or as monotherapy;
If used, must use w/ diuretic to limit fluid retention;
Monitoring Parameters:
- BP, orthostasis;
Patient Education:
- take at bedtime;
- rise slowly from seated/supine position
Term
central alpha-2 agonists - clonidine [Catapres], methyldopa [Aldomet]
Definition
MoA: stimulate central pre-synaptic alpha-2 receptors;
Pros: available as patch (improves compliance), most safety & efficacy in pregnancy (methyldopa);
ADRs: sedation, dry mouth, bradycardia, sexual dysfunction, skin rash, depression, hemolytic anemia, hepatic dysfunction;
Significant rebound HTN if abrupt D/C (taper over 2-4 days);
Best in combo w/ diuretic;
Avoid in elderly;
Have pt take oral dose day of converting to patch!
Term
direct vasodilators - hydralazine [Apresoline), minoxidil [Loniten]
Definition
MoA: direct arteriolar smooth muscle relaxation;
Pros: effective for REFRACTORY HTN;
ADRs:
H - tachycardia, fluid retention, worsening angina, HA, drug-induced lupus, peripheral neuropathy;
M - tachycardia, fluid retention, worsening angina, hypertrichosis (increased hair growth);
Causes profound vasodilation;
Need to use diuretic & beta-blocker in combo to counteract compensatory changes to profound vasodilation;
LAST-LINE THERAPY;
Monitoring: BP, HR, edema, ADRs;
Term
1st line agents for HTN with High Coronary Disease Risk
Definition
1) diuretic;
2) beta-blocker (depends on which guidelines you use);
3) ACE-I;
4) ARB;
5) CCB
Term
1st line agents for HTN with DM
Definition
1) diuretic;
2) beta-blocker (per JNC, NOT AHA);
3) ACE-I;
4) ARB;
5) CCB;
Term
1st line agents for HTN with CKD
Definition
1) ACE-I;
2) ARB;
Term
1st line agents for HTN with Recurrent Stroke Prevention
Definition
1) diuretic + ACE-I
Term
1st line agents for HTN with Stable Angina (High Coronary Disease Risk)
Definition
1) beta-blocker - DRUG OF CHOICE;
2) CCB (long-acting) - Alternative
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