Antihypertensive Flashcards
• Hypertension is the most common
CV disease
Management of hypertension
Non-pharmacologic management; includes
4 things
- -Diet(increase consumption of potassium and calcium with moderate decrease in sodium intake).
- -Exercise.
- -Weight reduction.
- -Stop smoking & alcohol intake
Management of hypertension
Pharmacologic:
5 things
- Diuretics.
- Sympatholytics.
- Calcium channel blockers (CCBs)
- Inhibitors of angiotensin (ACEI &ARAs/ARBs).
- Direct vasodilators
Hypertension cause ———- like ——-4things
Target organ damage cerebrovascular accidents congestive heart failure MI renal damage
Inc. CO affect ————more
Systolic pressure
Inc. PR affect ——–more
Diastolic pressure
• Normal regulation of BP:
BP=—————-
COXPR
Hypertension : 5-10% is secondary to ————
9 things
renal disease pheochromocytoma Cushing hyperaldosteronism or drugs (either VC as phenylephrine in flu medication volume expanders as glucocorticoids NSAlDs and oral contraceptives
Essential or primary where no———–
where no specific cause can be found.
chronic use of Morphine cause ———-
Salt and Water retention which cause hypertension
- Normal regulation of BP:
* CO= ————-
HR X stroke volume
• BP is regulated by:———————,
long term control ——————-
- Baroreceptors: rapid, responsible for moment to moment control.
- Renin angiotensin aldosterone system (RAAS): kidney is responsible for long term control of BP through this system.
Antihypertensive drugs act by —————–
interfering with these normal mechanisms.
Potassium is considered as ——–
Vasorelaxent
Smoking cause hypertension due to——
Nicotine which is vasoconstrictive
————-Act primarily by depleting body sodium stores thus reducing blood volume & CO.Peripheral resistance(PR) may ——————-
Diuretics - increase
Diuretic:Long term treatment causes CO to return to ———-while PR—–
normal - decrease
Diuretics: Thiazides are used in ————-to———– hypertension
mild to moderate
while loop diuretics are used in———— and in patients with———- or those ———–.
severe type- renal affection(not renal failure )-not responding to other diuretics
In more severe hypertension they are combined with —————–or———- to control tendency towards Na retention caused by these drugs—————
vasodilators (VDs) or sympatholytic agents- vasodilator and sympatholytic
The least expensive ———-
diuretics
Sympathoplegic or sympatholytic drugs :Centrally acting sympathoplegic drugs (—————):
alpha methyl dopa & clonidine
centrally acting Sympathoplegic or sympatholytic have mechanism :2 things
- decerese sympathetic outflow from vasopressor centers in the brain stem
- Bind to central alpha2 adrenoceptors(dec. norepinephrine) ( decreasing central sympathetic outflow)
1st choice in hypertensive pregnant patients is ————–
alpha methyl dopa
Side effects of Alpha methyl dopa :9 things
CNS adverse effects: night mares, depression, sedation, extra pyramidal symptoms.
Hemolytic anemia, hepatitis, systemic Lupus Erythematosis (SLE) & positive Coomb’s test. Lactation (hyperprolactinemia).
drug use in hypertension with renal failure
clonidine
ß-adrenoceptor blockers like ——
propanolol
• Mechanism of action of beta adreno receptor blocker
4 things
- dec HR, contractility and CO primarily.
- dec central sympathetic outflow.
- dec Renin release.
- decPR
Advantages of Betadrenoreceptor blocker
- dec morbidity & mortality & protect against heart disease.
- Relatively not expensive.
• Indications of using beta-adrenoreceptor blocker
5 things
• Hypertension complicated with myocardial infarction, angina, supraventricular dysrhythmia, migraine, essential tremors
we dont give diuretic at night, we give it early in the morning, why ?
to make pateint sleep عشان لا يحشر
pateint has hypertension and renal failure , what would you get him to have ?
clonidine
adverse effects of clonidine ?
4 things
- Dry mouth, sedation, depression.
* Sudden withdrawal *hypenensive crisis (treated by alpha & beta blockers).
Sudden withdrawal of Clonidine treated by ——— and ——-
alpha and beta blokers
ß-adrenoceptor blockers for hypertension act on which receptor —–
beta 1
• Adverse effects of beta-adrenoceptor blockers :
6 things
1- CNS: depression, fatigue, insomnia.
2-Bradycardia & hypotension.
3-dec libido & impotence in males (dec compliance)
4-Glucose intolerance (mask signs and symptoms of hypoglycemia and delay recovery from hypoglycemia in IDD) & dyslipidemia
5-Brochospasm, cold extremities, heart block (less with ßl selective).
6-Abrupt(sudden) withdrawal —rebound hypertension, nervousness, myocardial infarction may occur(must be withdrawn over 2-3weeks)
betadrenorecetpor blocker must be withdrawn over —–to——–weeks
2-3 weeks
any thing affect libido means it affect on ————–receptor
alpha and beta receptor
Someone has hypertension and prostatic hyperplasia, what drug can he use ?
prazosin & doxazosin
• Selective alpha1 blockers as ———-and———-
prazosin & doxazosin
————————–cause less reflex tachycardia (as they allow norepinephrine to exert feed back inhibition on its own release through unblocked a2) than non-selective a blockers like ———- that use for hypertension cause by ——–
- Selective alpha 1 blockers as prazosin & doxazosin
- phenoxybenzamine - pheochromocytoma
alpha-adrenoceptor blocker act by blocking alpha1 receptors———– in—————— and ———-PR
arterioles -venules- decrease
adverse effects of alpha-adrenoceptor?
3 things
- Postural hypotension occurs with these drugs.
- Also salt & water retention headache and nasal congestion may occur.
- Sexual dysfunction in males may occur
alpha-adrenoceptors may be combined with ———————or—————-
with diuretic or beta blocker (for tachycardia).