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Hypertension 第三組 姚佳汶、陳裔庭、吳承儒 指導藥師 陳寬軒、楊曜嘉 藥師 指導幹部 劉俐婷 科主任

Hypertension - · PDF file03.05.2011 · Renin–Angiotensin–Aldosterone System ... 1. ↑ Urinary excretion of Na+ and water 2. ... Avoid short-acting

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Page 1: Hypertension -   · PDF file03.05.2011 · Renin–Angiotensin–Aldosterone System ... 1. ↑ Urinary excretion of Na+ and water 2. ... Avoid short-acting

Hypertension

第三組

姚佳汶、陳裔庭、吳承儒

指導藥師

陳寬軒、楊曜嘉 藥師

指導幹部

劉俐婷 科主任

Page 2: Hypertension -   · PDF file03.05.2011 · Renin–Angiotensin–Aldosterone System ... 1. ↑ Urinary excretion of Na+ and water 2. ... Avoid short-acting

Content

About Hypertension

Treatment

Special population

Case report & Discussion

2

Page 3: Hypertension -   · PDF file03.05.2011 · Renin–Angiotensin–Aldosterone System ... 1. ↑ Urinary excretion of Na+ and water 2. ... Avoid short-acting

About Hypertension

3

Page 4: Hypertension -   · PDF file03.05.2011 · Renin–Angiotensin–Aldosterone System ... 1. ↑ Urinary excretion of Na+ and water 2. ... Avoid short-acting

Definition

Hypertension is simply defined as

persistently elevated arterial blood pressure

*Hypertensive crises ≧ 180/120 mmHg as either a

hypertensive emergency or hypertensive urgency

4

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Blood Pressure

I. Mean arterial pressure = (SBP × 1/3) + (DBP × 2/3)

BP = cardiac output × total peripheral resistance

*Cardiac output is a function of stroke volume,

heart rate, and venous capacitance

II. Measuring Blood Pressure

1. Sphygmomanometry- AHA Procedure

2. Self Blood Pressure Monitoring

At least 2 times/day (morning and night)

5

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Pathophysiology

I. Humoral Mechanisms

1. The RAAS

2. Natriuretic Hormone

3. Insulin Resistance & Hyperinsulinemia

II. Neuronal Regulation

III. Peripheral Auto-regulatory Components

IV. Vascular Endothelial Mechanisms

V. Electrolytes & Other Chemicals

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Pathophysiology (1)

Renin–Angiotensin–Aldosterone System

I. Stimulate renin secretion

1. Renal artery pressure↓ & kidney blood flow↓

2. Na and Cl delivered to the distal tubule ↓

3. Catecholamines ↑

4. Serum K+ and/ or intracellular Ca2+↓

Page 8: Hypertension -   · PDF file03.05.2011 · Renin–Angiotensin–Aldosterone System ... 1. ↑ Urinary excretion of Na+ and water 2. ... Avoid short-acting

II. The function of circulating angiotensin II:

1. Elevate BP through pressor effects:

a. Direct vasoconstriction

b. Stimulation of catecholamine release

c. Centrally mediated increases in

sympathetic nervous system activity

2. Stimulates aldosterone synthesis:

Leads to sodium and water reabsorption

→ Plasma volume↑, Total peripheral resistance↑→ BP↑

Pathophysiology (2)

Renin–Angiotensin–Aldosterone System

Page 9: Hypertension -   · PDF file03.05.2011 · Renin–Angiotensin–Aldosterone System ... 1. ↑ Urinary excretion of Na+ and water 2. ... Avoid short-acting

From pharmacotherapy 7th Chap.15 Fig.15-1

Direct

Renin

Inhibitor

ACE

inhibitors

CCBs

ARBs

CCBs &

β-blockers

Aldosterone

antagonist

Diuretics

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Pathophysiology (3)

I. Natriuretic Hormone

1. ↑ Urinary excretion of Na+ and water

2. Block the active transport of sodium

→ intracellular [Na+]↑→ vascular tone and BP ↑

II. Insulin Resistance and Hyperinsulinemia

1. Renal sodium retention ↑

2. Sympathetic nervous system activity ↑

3. Growth hormone-like actions

4. Intracellular Ca2 ↑→ vascular resistance ↑

Page 11: Hypertension -   · PDF file03.05.2011 · Renin–Angiotensin–Aldosterone System ... 1. ↑ Urinary excretion of Na+ and water 2. ... Avoid short-acting

Pathophysiology (4)

Neuronal RegulationI. Presynaptic receptors (NE release)

1. α-receptors (α2) ↓

2. β-receptors ↑

II. Postsynaptic receptors1. α-receptors (α1), vasoconstriction

2. β1-receptors, ↑heart rate and contractility

3. β2-receptors, vasodilation

III. Baroreceptor reflex system1. Major negative-feedback mechanism that controls

sympathetic activity

2. May be blunted in the elderly and those with diabetes

IV. Central nervous system1. α2-adrenergic stimulation ↓ BP

2. Angiotensin II ↑ sympathetic outflow

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Pathophysiology (5)

I. Peripheral Auto-regulatory Components

1. Kidney

a. Defect in sodium excretion may first develop

b. Volume-pressure adaptive mechanism

2. Local auto-regulatory

Maintain adequate tissue oxygenation

II. Vascular Endothelial Mechanisms

1. Vasodilating substances: Prostacyclin, Bradykinin

2. Vasoconstricting substances: Angiotensin II, Endothelin I

3. Nitric oxide (NO)

III. Electrolytes & Other Chemicals: Na, K, Ca

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Etiology (1)

I. Essential or primary hypertension:

more than 90%

1. Unknown pathophysiologic etiology

2. Genetic factors may play an important role

in the essential hypertension

3. Cannot be cured, but it can be controlled

13

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Etiology (2)

II. Secondary hypertension: fewer than 10%

1. Many secondary causes are concurrent

medical conditions or endogenously induced

2. Renal dysfunction or renovascular disease

are the very common secondary cause

3. If the cause can be identified,

hypertension has the potential to be cured

14

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Secondary causes

I. Renal artery stenosis

II. Cushing’s syndrome

III. Coarctation of the aorta

IV. Pheochromocytoma

V. Primary aldosteronism

VI. Renal vascular disease

VII. Drugs

15

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Epidemiology (1)

BP values increase with age,

hypertension is very common in the elderly

USA Taiwan

In 2000,

age≧ 60 years → 65.4 %

In 2002,

age≧ 65 years → 56.6 %

Before 45 y/o : men

45-54 y/o : men slightly higher

After 55 y/o : women

Before 60 y/o : men

After 60 y/o : women

Reference: 行政院衛生署國民健康局2002年台灣地區高血壓、高血糖、高血脂盛行率調查報告。

16

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Epidemiology (2)

• Hypertension in Taiwan

Male Female

Prevalence 25 % 18%

Awareness 59% 79%

On treatment 47% 64%

Controlled BP 21% 29%

Reference: 行政院衛生署國民健康局2002

年台灣地區高血壓、高血糖、高血脂盛行率調查報告。

17

Page 18: Hypertension -   · PDF file03.05.2011 · Renin–Angiotensin–Aldosterone System ... 1. ↑ Urinary excretion of Na+ and water 2. ... Avoid short-acting

Clinical Presentation of Hypertension

I. Signs: Elevated BP

II. Symptoms : Most patients are asymptomatic

III.CV risk factors:

1. Age (Men: ≥55 years / Women: ≥ 65 years)

2. Diabetes mellitus

3. Dyslipidemia

4. Microalbuminuria

5. Family history

6. Obesity (BMI ≥ 30 kg/m2)

7. Physical inactivity

8. Tobacco use

IV. Target-Organ Damage

Eyes, brain, heart, kidneys, peripheral vascular

18

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Clinical Evaluation

I. Elevated BP

II. Complete medical evaluation:

1. Comprehensive medical history

2. Physical examination

3. Laboratory and/or diagnostic tests

To (a) identify secondary causes

(b) identify other CV risk factors or comorbid conditions

(c) assess hypertension-associated target-organ damage

19

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Laboratory and/or diagnostic tests

I. Laboratory Tests

1. Blood urea nitrogen/serum creatinine

2. Fasting lipid panel

3. Fasting blood glucose

4. Serum electrolytes

5. Spot urine albumin-to-creatinine ratio

II. Diagnostic Tests

1. 12-lead electrocardiogram

2. Estimated glomerular filtration rate (eGFR)

3. 10-year risk of fatal coronary heart disease or

non-fatal myocardial infarction, based on Framingham scoring

20

Page 21: Hypertension -   · PDF file03.05.2011 · Renin–Angiotensin–Aldosterone System ... 1. ↑ Urinary excretion of Na+ and water 2. ... Avoid short-acting

Framingham scoring

Score: -9+4 +0 +1 +1 = -321

Page 22: Hypertension -   · PDF file03.05.2011 · Renin–Angiotensin–Aldosterone System ... 1. ↑ Urinary excretion of Na+ and water 2. ... Avoid short-acting

Therapy

I. Overall goal:

Reduce associated morbidity & mortality

II. Surrogate goal:

achieve a desired target BP value

1. Most patients--140/90 mmHg

2. DM, CAD, CKD--130/80 mmHg

3. Left ventricular dysfunction--120/80 mmHg

Avoid clinical inertia

22

Page 23: Hypertension -   · PDF file03.05.2011 · Renin–Angiotensin–Aldosterone System ... 1. ↑ Urinary excretion of Na+ and water 2. ... Avoid short-acting

Treatment

I. Nonpharmacologic therapy:

Lifestyle modification, DASH (all stage)

II. Pharmacotherapy:

Diuretics, ACE inhibitor,

Angiotensin II receptor blocker (ARB),

Calcium channel blocker

The Dietary Approaches to Stop Hypertension

23

Page 24: Hypertension -   · PDF file03.05.2011 · Renin–Angiotensin–Aldosterone System ... 1. ↑ Urinary excretion of Na+ and water 2. ... Avoid short-acting

Lifestyle Modification

24

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Lifestyle modification-SABCDEI. S- Salt restriction

Salt : 6 g/day (1 g salt = 0.4 g sodium)

II. A- Alcohol limitation

Beer : M < 700 ml/day, F < 470 ml/day

Wine : M < 240 ml/day, F < 160 ml/day

III. B- Body weight reduction

BMI : 18.5-24.9

Waist : M < 90 cm (35 inches)

F < 80 cm (32 inches)

Every losing Kg can lower 1 mmHg SBP

低鈉鹽

25

Page 26: Hypertension -   · PDF file03.05.2011 · Renin–Angiotensin–Aldosterone System ... 1. ↑ Urinary excretion of Na+ and water 2. ... Avoid short-acting

Lifestyle modification-SABCDE

IV. C- Cessation of smoking

V. D- Diet adaptation

More vegetable, Less cholesterol

VI. E- Exercise adoption

30 mins / day, 5 days / week

26

Page 27: Hypertension -   · PDF file03.05.2011 · Renin–Angiotensin–Aldosterone System ... 1. ↑ Urinary excretion of Na+ and water 2. ... Avoid short-acting

Pharmacotherapy

27

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28

Diuretics

Page 29: Hypertension -   · PDF file03.05.2011 · Renin–Angiotensin–Aldosterone System ... 1. ↑ Urinary excretion of Na+ and water 2. ... Avoid short-acting

Diuretics (1)

I. First-line agents for hypertension (JNC7)

II. Four subclasses

1. Thiazides

2. Loops

3. Potassium-sparing

4. Aldosterone antagonists

III. Mechanisms

1. Initial: diuresis; ↓stroke volume, cardiac output

2. Chronic: peripheral vascular resistance ↓

3. Other: mobilize sodium and water from arteriolar

walls29

Page 30: Hypertension -   · PDF file03.05.2011 · Renin–Angiotensin–Aldosterone System ... 1. ↑ Urinary excretion of Na+ and water 2. ... Avoid short-acting

Diuretics (2)

IV. Pharmacokinetic differences

different in half-life and duration of diuretic effect

has no differences in CV outcome

V. Side effects (high doses)

1. Hypokalemia, hypomagnesemia, hypercalcemia

2. Hyperuricemia (use allopurinol)

3. Hyperglycemia

4. Dyslipidemia

5. Hyperkalemia

30

Page 31: Hypertension -   · PDF file03.05.2011 · Renin–Angiotensin–Aldosterone System ... 1. ↑ Urinary excretion of Na+ and water 2. ... Avoid short-acting

Diuretics (3)

I. Thiazide

1. Thiazides are more effective antihypertensives than loop

2. Maintain potassium concentration 4.0–5.0 mEq/L to

minimize metabolic effects

3. Hydrochlorothiazide & chlorthalidone:

max effective dose: 25 mg/day

4. Chlorthalidone:

a. Twice as potent as hydrochlorothiazide

b. Additional benefits in osteoporosis

c. May require additional monitoring in patients with a

history of gout or hyperglycemia

31

藥品名稱 Hydrochlorothiazide Chlorthialidone

Potency 1 1.5~2X

Half-life (hr) 8~15 45~60

Duration (hr) 16~24 48~72

Page 32: Hypertension -   · PDF file03.05.2011 · Renin–Angiotensin–Aldosterone System ... 1. ↑ Urinary excretion of Na+ and water 2. ... Avoid short-acting

Diuretics (4)

II. Loop

Higher doses may be needed for patients with

severely decreased glomerular filtration rate or

left ventricular dysfunction

III. Potassium sparing

1. Weak diuretics are used in combinations

2. Avoid in patients with severe chronic kidney

3. May cause hyperkalemia, in combination with

an ACEI, ARB, direct renin inhibitor or

potassium supplements32

Page 33: Hypertension -   · PDF file03.05.2011 · Renin–Angiotensin–Aldosterone System ... 1. ↑ Urinary excretion of Na+ and water 2. ... Avoid short-acting

Diuretics (5)

IV. Aldosterone antagonists

Avoid spironolactone in patients with chronic

kidney disease

33

Page 34: Hypertension -   · PDF file03.05.2011 · Renin–Angiotensin–Aldosterone System ... 1. ↑ Urinary excretion of Na+ and water 2. ... Avoid short-acting

ACE inhibitors and ARBs

34

Page 35: Hypertension -   · PDF file03.05.2011 · Renin–Angiotensin–Aldosterone System ... 1. ↑ Urinary excretion of Na+ and water 2. ... Avoid short-acting

ACE inhibitors & ARBs

I. ACE inhibitors - do not use in pregnancy or in

patients with a history of angioedema

1. Starting dose may be reduced 50% in patients on

a diuretic, are volume depleted, or very elderly

II. ARBs (Angiotensin receptor blockers)

Usually not cause dry cough; others as same as ACEI

35

Page 36: Hypertension -   · PDF file03.05.2011 · Renin–Angiotensin–Aldosterone System ... 1. ↑ Urinary excretion of Na+ and water 2. ... Avoid short-acting

ACE inhibitors (1)

I. Mechanism:

1. Block the ACE (bradykinase), inhibiting

conversion of angiotensin I to angiotensin II

→vasodilation and ↓ aldosterone

2. Block degradation of bradykinin→ Increased

bradykinin enhances the BP-lowering effects

3. Stimulate the synthesis of other vasodilating

substances: prostaglandin E2 & prostacyclin

36

Page 37: Hypertension -   · PDF file03.05.2011 · Renin–Angiotensin–Aldosterone System ... 1. ↑ Urinary excretion of Na+ and water 2. ... Avoid short-acting

ACE inhibitors (2)

II. Benefits:

1. Prevent or regress left ventricular hypertrophy

2. Good for atherosclerotic vascular even in the

left ventricular systolic dysfunction or heart failure

3. Reduce CV morbidity and mortality in patients

with left ventricular dysfunction

4. Decrease progression of chronic kidney disease

5. Have the potential to reduce the development of

new-onset type 2 diabetes

37

Page 38: Hypertension -   · PDF file03.05.2011 · Renin–Angiotensin–Aldosterone System ... 1. ↑ Urinary excretion of Na+ and water 2. ... Avoid short-acting

ACE inhibitors (3)III. Characteristics:

All ACEI except captopril can be dosed once daily

(Captopril is dosed 2 or 3 times daily.)

IV. Side effects:

1. Dry cough

2. Hyperkalemia→ monitor serum potassium& creatinine

3. Acute kidney failure→ prevented by slowly titrating the

dose and monitoring kidney function

4. GFR decreases: often increases serum creatinine

→ if larger increases occur, stop or reduce the dose

5. Angioedema→ Discontinue using ACEI &

requires epinephrine, corticosteroids, antihistamines

or emergent intubations 38

Page 39: Hypertension -   · PDF file03.05.2011 · Renin–Angiotensin–Aldosterone System ... 1. ↑ Urinary excretion of Na+ and water 2. ... Avoid short-acting

ACE inhibitors (4)

V. Notes:

1. ACEI can increase lithium serum conc.

2. ACEI are absolutely contraindicated in

pregnancy & with a history of angioedema

3. Start low doses of ACEI, even lower doses in

orthostatic hypotension or severe renal

dysfunction

39

Page 40: Hypertension -   · PDF file03.05.2011 · Renin–Angiotensin–Aldosterone System ... 1. ↑ Urinary excretion of Na+ and water 2. ... Avoid short-acting

Angiotensin Receptor Blockers (1)

I. Mechanism:

ARBs inhibit angiotensin II from all pathways,

directly block the angiotensin II receptor subtype 1

II. Benefits:

1. Long-term reductions in target-organ damage progression

2. Significantly reduced progression of nephropathy

in patients with type 2 diabetes and nephropathy

3. ARB + diuretic, ACE inhibitor, and β-blocker reduce risk of

CV events for patients with left ventricular dysfunction

40

Page 41: Hypertension -   · PDF file03.05.2011 · Renin–Angiotensin–Aldosterone System ... 1. ↑ Urinary excretion of Na+ and water 2. ... Avoid short-acting

Angiotensin Receptor Blockers (2)

III. Characteristics:

1. Have a fairly flat dose–response curve

2. Most ARBs have long half-life

3. Low doses of a thiazide-type diuretic + ARB

significantly increases antihypertensive effects

4. ARBs have the lowest incidence of side

effects compared to others41

Page 42: Hypertension -   · PDF file03.05.2011 · Renin–Angiotensin–Aldosterone System ... 1. ↑ Urinary excretion of Na+ and water 2. ... Avoid short-acting

Calcium Channel Blockers

42

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Calcium Channel Blockers (1)I. Mechanisms:

1. CCBs inhibit influx of calcium across the cell

membrane

2. Currently available CCBs only block the

L-type channel, which leads to

coronary and peripheral vasodilation

II. Antihypertensive effect is similar

Dihydropyridine are as effective at lowering CV

events as other agent

III. All CCBs (except amlodipine and felodipine)

have negative inotropic effects

43

Page 44: Hypertension -   · PDF file03.05.2011 · Renin–Angiotensin–Aldosterone System ... 1. ↑ Urinary excretion of Na+ and water 2. ... Avoid short-acting

Calcium channel blockers (2)I. Dihydropyridines

1. Avoid short-acting

immediate-release nifedipine and nicardipine

2. Dihydropyridines are more potent peripheral

vasodilators than nondihydropyridines;

may cause more reflex sympathetic discharge

3. Benefits in Raynaud’s syndrome

4. The hepatic metabolism may be inhibited by

large quantities of grapefruit juice.

44

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Calcium channel blockers (3)

II. Nondihydropyridines

1. Extended-release and sustained-release are

preferred for hypertension treatment

2. Block slow channels in the heart

(↓ heart rate & may produce heart block)

3. Benefits in patients with atrial tachyarrhythmia

4. Drug interactions: inhibit the CYP450 3A4

45

Page 46: Hypertension -   · PDF file03.05.2011 · Renin–Angiotensin–Aldosterone System ... 1. ↑ Urinary excretion of Na+ and water 2. ... Avoid short-acting

Dihydropyridines Nondihydropyridines

1. May cause a baroreceptor

mediated reflex tachycardia

2. Do not alter conduction

through the AV node

3. Side effects:

dizziness, headache,

gingival hyperplasia,

peripheral edema,

flushing

4. Very effective in older

patients with isolated

systolic hypertension

1. Decrease heart rate and

slow AV nodal conduction

2. treat supraventricular

tachyarrhythmias (e.g. AF)

3. Side effects:

Anorexia, hypotension,

nausea & peripheral edema

Constipation.

Cardiac conduction

abnormalities)

46

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β blocker

I. Mechanism

II. Pharmacodynamic

III. Pharmacokinetic

IV. Side effect

V. Abrubt cessation

47

Page 48: Hypertension -   · PDF file03.05.2011 · Renin–Angiotensin–Aldosterone System ... 1. ↑ Urinary excretion of Na+ and water 2. ... Avoid short-acting

Mechanism of β blockerI. Negative chronotropic and Inotorpic cardiac

effects-- reduce cardiac output

II. Inhibit β-adrenoceptors & renin realese

-reduce CV risk

III. β₁-receptor:

Heart (increase heart rate, contractility)

Kidney (renin release)

IV. β₂ -receptor:

Lungs, Liver, Pancreas and Arteriolar smooth

muscle (Bronchodilation and vasodilation)

48

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Pharmacodynamic of β blockerI. Cardioselective :greater affinity for β₁

1. Atenolol, metoprolol

2. Dose-dependent

3. Not likely provoke bronchospasm and

vasodilation

II. Intrinsic sympathomimetic activity (ISA)

1. Acebutolol, pindolol

2. Act as partial β-agonist

3. May increase risk post-MI or CAD

III. Mixed α & β blockers (carvedilol)

Additional α-blockade produces more orthostatic

hypotension 49

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Pharmakokinectic of β blocker

I. First-pass metabolism

Propranolol and metoprolol

II. Renal excretion

Atenolol and nadolol

III. Lipophilic-penetrate CNS

1. Most-Propranolol Least-Atenolol

2. Migrane headache, essential tremor,

thyrotoxicosis

IV. Serum half-life50

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Side Effect of β blocker

I. Extension of antagonize β-adrenoceptor

II. Myocardium:

Bradycardia, AV conduction abnormalities,

Acute heart failure

III. Ateriolar smooth mucsle:

Cold extremities, Raynaud’s syndrome

51

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Abrupt Cessation of β blocker

I. Abrupt cessation of β-blocker therapy can

cause rebound hypertension

II. Patients with coronary disease:

Unstable angina, MI, death

III. Patients without coronoary disease :

Tachycardia, sweating,

generalized malaise

52

Page 53: Hypertension -   · PDF file03.05.2011 · Renin–Angiotensin–Aldosterone System ... 1. ↑ Urinary excretion of Na+ and water 2. ... Avoid short-acting

From JNC753

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Alternative drug treatment

I. α -blocker

II. Central α₂ agonist

III. Direct renin inhibitor

IV. Vasodilator

For patients with resistant hypertention

Only be used as add-on therapy

54

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Alternative AgentsClass Drug Mechanism Note

Alpha-1

blockers

Prazosin,

terazosin,

doxazosin

Inhibit the uptake of

catecholamines in

smooth muscle

cells

“first-dose”

phenomenon

Direct renin

inhibitor

Aliskiren Block the RAAS at its

point of activation

Similar to ACEI

Containdicated in

pregnancy

Cental alpha-2

agonist

Clonidine,

guanabenz,

guanfacine,

methyldopa

Stimulate alpha-2

adrenergic receptors

in the brain

Sodium-water

retention ,depression,

anticholinergic

effect(clonidine)

Hepatitis, hemolytic

anemia(methyldopa)55

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Alternative AgentsClass Drug Mechanism Note

NE depleting Reserpine Depleting

and blocking

transport of

norepinephri

ne

Significant

Sodium-

water

retention ,inc

reased

parasympath

etic activity

Direct Arterial

vasodilator

Hydralazine,

minoxidil

Directly relax

arteriolar

smooth

muscle

Lupus-like

syndrome(hyd

ralazine)

Hirsutism(min

oxidil)

56

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Compelling Indications

I. Left ventricular dysfunction

II. Post MI

III. Coronary artery disease (CAD)

IV. Diabetes mellitus (DM)

V. Chronic kidney disease (CKD)

VI. Recurrent stroke prevention

57

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Left Ventricular Dysfunction

I. BP goal:120/80 mmHg

II. ACE inhibitor (reduced CV events) +

Diuretic (edema relief)

III. Other drugs

1. Loop diuretic—for advanced disease

2. β-blocker—modify LV dysfunction

3. ARBs—alternatives for ACE inhibitor or add-on

4. Spironolactone—severe LV dysfunction

58

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Post MI

I. BP goal:130/80 mmHg

II. β-blocker (without ISA) + ACE inhibitor

III. Mechanism

1. β-blockers decrease cardiac adrenergic

stimulation

2. ACE inhibitors improve cardiac remodeling,

cardiac function

3. Both can reduce CV risk

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Coronary Artery Disease

I. BP goal:130/80 mmHg

II. Chronic stable angina

β-blocker (without ISA) + long acting CCBs

III. Acute STEMI and NonSTEMI

β-blocker (without ISA) + ACE inhibitors

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Diabetes Mellitus

I. BP goal:130/80 mmHg

II. ACE inhibitor or ARB (nephroprotection)

III. Other drugs

1. Thiazide diuretic-- lower BP & CV risk

2. CCBs-- add-on for BP control

3. β -blocker-- CV risk reduction (may mask

hypoglycemia or induce hyperglycemia)

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Chronic Kidney Disease

I. Strict BP goal:130/80 mmHg

II. ACE inhibitor or ARB

III. Mechanism

reduce intraglomerular pressure

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From JNC763

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Special population

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Older people

I. Older people--Isolated systolic HTN

II. More sensitive to volume depletion

and sympathetic inhibition

III. Orthostatic hypotension

ACE inhibitors

Smaller-than-usual initial dose

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Patients at Risk for

Orthostatic HypotensionI. Definition (from supine to standing)

1. ↓ SBP decrease 20 mmHg

2. ↓ DBP decrease 10 mmHg

II. Risks of orthostatic hypotension

1. Older patients (especially with isolated systolic hypotension)

2. Diabetes

3. Severe volume depletion

4. Baroreflex dysfunction

5. Autonomic insufficiency

6. Use of venodilators (α-blockers, mixed α/ β-blockers,

nitrates, and phosphodiesterase inhibitors)

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Ⅰ. Definition

1. Hypertension: SBP and/or DBP that is greater than

95th percentile

2. Prehypertension: BP between 90th to 95th, or ≧

120/80 mmHg

Ⅱ. Secondary hypertension is more common

1. Family history of high BP

2. Overweight

3. Kidney disease

4. Coarctation of the aorta

Hypertension in Children and

Adolescents

Hypertension Prehypertension

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Pregnancy (1)

I. Categorization

1. Preeclampsia (after 20 weeks gestation)

new-onset hypertension with proteinuria

2. Eclampsia

3. Gestational

new-onset hypertension (absence of

proteinuria)

4. Chronic

5. Superimposition of preeclampsia on chronic

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Pregnancy (2)

II. Treatment

1. Restricting activity, close monitoring and salt

restriction

2. Antihypertensive agents

a. IV hydralazine or IV labetalol

b. Methyldopa, labetalol

3. Not to use: ACEIs, ARBs, Aliskiren

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Other Concomitant Conditions (1)

I. Pulmonary Disease

1. Avoid β-blockers (especially nonselective)

2. Cardioselective β-blockers

Post-MI, coronary disease or heart failure

II. Peripheral Arterial Disease

1. BP goal: <130/80 mmHg

2. Drugs

a. ACEIs: ideal for symptomatic lower-extremity

peripheral arterial disease; decrease CV events

b. CCBs: beneficial of vasodilatory effects

c. β-blockers: problematic; stimulation of α-

receptors(vasoconstriction)70

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Other Concomitant Conditions (2)

III. Dyslipidemia

1. Avoid thiazide diuretics and β-blockers without ISA

2. α-Blockers have favorable effects

IV. Metabolic Syndrome

1. Definition (more than three)

a. Abdominal obesity (>90 cm in men; 80 cm in women)

b. Elevated triglyceride (≧150 mg/dL)

c. Lower HDL (<40 mg/dL in men;<50 mg/dL in women)

d. Elevated BP (≧130/85 mmHg)

e. Elevated fasting blood glucose (≧100mg/dL)

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Other Concomitant Conditions (3)

2. Treatment

ACEI or ARB may be beneficial

V. Erectile Dysfunction

Erectile dysfunction in hypertension may be an

important marker for CV disease

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Hypertensive Crisis

I. BP > 180/120 mmHg

II. Hypertensive urgency

1. Not associate with acute target-organ injury

2. Risk of rapid BP reduction

3. Management (oral; 140/90)

4. Drug: Captopril, Clonidine, Labetalol

III. Hypertensive emergency

1. Associate with acute target-organ injury

2. Management (parenteral; 25% mean artrial pressure)

3. Drug: Nitroprusside, Nitroglycerin, Fenoldopam,

Nicardipine

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Target-organ Damage

Eyes, brain, heart, kidneys,

peripheral vascular

I. Retinopathy:

arteriolar narrowing, arterivenous crossing

change, retinal hemorrhages, disk edema

II. Cerebrovascular disease:

gross neurologic deficits

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Target-organ Damage

III. Clincal CV events:

MI, stroke

IV. Kidney:

fibrinoid necrosis, atheroma of renal

arteries, hyaline arteriosclerosis

V. Peripheral vascular:

arterial bruits, distended veins, absent

peripheral arterial pulses

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Combination Antihypertensive

Therapy

I. Difficult goal achievement

-BP goals <130/80 mmHg; African Americans

II. Multiple compelling indications

III. Additive antihypertensive effects

-Diuretics+(ACEI, ARB, β-blocker)

IV. Fixed-dose combination products

1. Co-Aprovel (irbesartan+hydrochlorothiazide)

2. Co-Diovan (valsartan+hydrochlorothiazide)

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Resistant Hypertension

I. Definition

BP remains above goal in spite of concurrent

use of three antihypertensive agents of different

classes; BP is controlled with four or more

medications

II. Causes of resistant hypertension

1. Inadequate treatment regimens

2. Pseudoresistance

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Clinical Monitoring

I. Disease progression

Signs and symptoms of progressive target-organ

disease

II. Efficacy

BP response should be evaluated 2 to 4 weeks after

initiating or making changes in therapy

III. Toxicity

With an aldosterone antagonist (3 days and 1 week)

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病例報告

Case I Mr.W 57 yrs HTN

Case II Mrs.C 83 yrs HTN + DM

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Case I Report (1)

Mr. W 57y/o

• Chief complaint

– 2010.12.21 BP up to 172/110 mmHg

• History of present illness

-- 2010.12.19 172/113

2010.12.20 164/108

2010.12.21 177/121

• Past medical history

– Peptic ulcer

– GERD (LA grade: B)

– Other disease of vocal cords

– Operation of larynx

(left vocal leukoplakia)

• Personal history

– Smoking 1.5ppd for 40yrs

– Alcohol 1 bolt/day (Whisky) for 40 yrs

• Family history

– HTN, DM

– Mother: HTN & stroke

• Physical examination

– Wt 74.9kg; Ht 171cm

(BMI 25.6)

• Impression

-- Primary hypertension

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Case I Report (2)

• Laboratory and diagnostic tests (10/12/19)– BUN: 12 mg/dl 7~20 mg/dl

– Na: 139 mg/l 135~145 meq/l

– K: 3.9 meq/l 3.4~4.5 meq/l

– GLU: 90 mg/dl 60~110 mg/dl

– CREAT: 0.94 mg/dl 0.7~1.5 mg/dl

– ALT: 30 U/l 0~35 U/l

– AST: 32 U/l 8~40 U/l

– HDL: 60 mg/dl 40~60 mg/dl

– TG: 81 mg/dl 20~200 mg/dl

– TC: 235 mg/dl 125~240 mg/dl

– eGFR: 85.2 ml/min/1.73m2 > 60 ml/min/1.73m2

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Case I Report (3)

• Plan to do:

10/12/21

– Salt restriction

– Give Norvasc 5mg, po, qd

11/01/04

– Salt restriction

– Add Micardis 80mg, po, qd

11/03/03

– Salt restriction

– Smoke cessation

– Bring home BP device next time

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Case I Report (4)

• Patient drug profile– Norvasc 5mg, po, qn (10/12/21 OPD)

– Micardis 80mg, po,qd (11/01/04 OPD)

– Nexium 40mg, po, qdac

– Gascon 40mg, po, tidpc

– Mosapride 5mg, po, tid

– Alpraline 0.5mg, po, qn

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• Discussion病人評估治療目標非藥物治療辦法藥物治療選擇

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• 治療目標

– BP < 140/90 mmHg

• 非藥物治療辦法

– 戒菸戒酒

– 減重(運動)

– 飲食(限鹽,低脂,

少糖,高纖維)

• 病人評估

– Risk factor

• Age

• Family history

• Tobacco

– Framingham score

• 8+3+3-1+2=15 (20%)

– Target-organ harm

• Nil

Case I Report (5)

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JNC 7 guideline

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NICE guideline

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Case I Report (6)

11/01/04

Add on

Micardis (Telmisartan)

10/12/21

Norvasc

(Amlodipine)

88

50

70

90

110

130

150

170

190

2010/12/13 2010/12/23 2011/1/2 2011/1/12 2011/1/22 2011/2/1

SBP

DBP

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Case II Report

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Case II Report (1)

Mrs. C 83 y/o

• Chief complaint

Regular Meta OPD follow up for DM & HTN control

• History of present illness

Type 2 DM more than 10 yrs

HTN more than 2 years

• Past medical history

Iron deficiency anemia. 2007.09 Colon cancer.

• Personal history

Smoking (-), Alcohol (-),

Drug & Food Allergy: No known allergy90

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• Family history: nil

• Lab data

100/1/21 GLU: 180 mg/dl ; HbA1c: 8.2 %

• Impression

DM & Primary HTN

• Plan to do

Case II Report (2)

Drugs

Norvasc 5 mg 1 tab PO qd

Cozaar 50 mg 1 tab PO qd

Amaryl 2 mg 4 tab PO qdac

Januvia 100 mg 1 tab PO qd

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Case II Report (3)• Patient drug profile

• Laboratory and diagnostic test

Norvasc 5 mg 1.5 tab qd 2008/07/03 - 2009/02/24

Norvasc 5 mg 1 tab qd 2009/02/24 - 2011/02

Add Cozaar 50 mg 1 tab qd 2009/12/08 – 2011/02

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II. 高血壓治療目標

BP < 130/80 mmHg

III.非藥物治療辦法

– 運動

– 飲食(限鹽,低脂,

少糖,高纖維)

• Disccusion:

I.病人評估

- Risk factor

• Age

• DM

- Framingham score

• Not needed

• Coronary artery disease

risk equivalent

- Target-organ harm

• Nil

Case II Report (4)

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Case II Report (5)

IV.藥物治療選擇

Norvasc (Amlodipine) - CCB, dihydropyridine Cozaar (Losartan) – ARB

★ UK guidelines ★JNC7

For DM patients:First-line: ACEI or ARBAdd on: thiazide orCCB-nondihydropyridine

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Evaluation-PROCEED

P- Previous experience of patient

R- Risk factors

O- Organ damage

C- Contraindicaton

E- Expert or doctor judgment

E- Expense or cost

D- Delivery and compliance

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References

• Pharmacotherapy 7th Chap.15

• JNC7

• 2006.UK NICE guideline

• J. Formos Med. Assoc.

2010;109(10):740-733

• 2002年行政院衛生署國民健康局,台灣地區高血壓、高血糖、高血脂盛行率調查報告

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