Shared Flashcard Set

Details

Unit 10 - Cardiovascular Drugs & Disorders
Test 2
156
Nursing
Undergraduate 3
03/15/2014

Additional Nursing Flashcards

 


 

Cards

Term
What is myocardium?
Definition
Heart muscle.
Term
What is iNotpic?
Definition
Increases myocardial contraction and stroke volume
Term
What is dromotropic?
Definition
Affects the conduction of the cells of the heart
Term
What is chronotropic?
Definition
Influences the heart rate
Term
What is atrial fibrillation?
Definition
A cardiac dysrhythmia that has RAPID, UNCOORDINATED CONTRACTIONS of the atrium.
Term
What is atrial flutter?
Definition
A cardiac dysrhythmia where the heart contracts at 200-300 BEATS PER MINUTE
Term
How does the Sodium-Potassium pump work?
Definition
Normally, sodium levels are higher OUTSIDE of the cell than within. Sodium has to be pumped INTO the cell with the use of the Na-K pump. When the Na levels are high INSIDE of the cell, there is an influx of Ca which causes the heart to contract more efficiently.
Term
What happens to the myocardium during heart failure?
Definition
It weakens and enlarges.
Term
What is right-sided heart failure?
Definition
Blood/fluids back up into the peripheral tissues
Term
What is left-sided heart failure?
Definition
Blood/fluids back up into the lungs.
Term
What happens to afterload/preload during heart failure?
Definition
There is an increase in preload, which leads to an increase in after load.
Term
What causes excess preload in CHF?
Definition
excess blood volume in the ventricle at the end of diastole due to increased in elasticity of the ventricular walls r/t weakness of the heart.
Term
What causes excess after load in CHF?
Definition
caused by excess resistance in the aorta, which must be overcome to open the aortic valve and eject blood into the circulation.
Term
How does blood flow INTO the heart?
Definition
Dirty, unoxygenated blood fills the RIGHT side of the heart to be pumped to the lungs for oxygenation. Clean, oxygenated blood comes in the LEFT side of the heart and then out for systemic use.
Term
Right side of the heart is _____________.
Definition
PULMONARY
Term
Left side of the heart is ______________.
Definition
SYSTEMIC
Term
What are causes of heart failure?
Definition
-Chronic Hypertension
-Myocardial Infarction
-Coronary Artery Disease
-Valvular Heart Disease
-Congenital Heart Disease
-Aging
Term
What are some non pharmacological ways to treat heart failure?
Definition
Limit salt intake to 2g/day
Limit alcohol use
NO SMOKING
NO OBESITY
Term
What lab results are important for monitoring CHF?
Definition
-Atrial Natriuretic Peptide (ANP)
-Brain Natriuretic Peptide (BNP)

Normal BNP = <100
CHF = >400
Term
What are the stages of CHF?
Definition
1. High risk for HF w/o symptoms or structural disease
2. Some levels of cardiac changes
3. Structural heart disease w/ symptoms of HF
4. Severe structural heart disease and marked symptoms of HF @ rest
Term
How do cardiac glycosides work?
Definition
They inhibit the sodium-potassium pump. Increases the level of sodium INSIDE of the cell causing an influx of Calcium, which causes the heart muscle to contract more efficiently.
Term
What is cardiac glycosides positive INOTROPIC action?
Definition
Increases myocardial contraction and stroke volume of the heart. This in turn strengthens cardiac, peripheral, and kidney function by:
-enhancing cardiac output
-decreases PRELOAD
-improves bloodflow to periphery + kidneys
-decreases edema
-promotes fluid excretion
Term
What is cardiac glycosides negative CHRONOTROPIC action?
Definition
Decreases the HR
Term
What is cardiac glycosides negative DROMOTROPIC action?
Definition
Decreases conduction of the heart cells through the AV node.
Term
B/c of cardiac glycosides dromotropic and chronotropic action, what can it also treat?
Definition
atrial fibrilation + flutter
Term
What happens when diuretics and digoxin are mixed?
Definition
Decreases K+ which leads the patient to become HYPOKALEMIC which leads to DIG TOXICITY
Term
What happens when Glucocorticoids and Digoxin are mixed?
Definition
Promotes sodium retention and loss of potassium ions which leads to HYPOKALEMIA which leads to DIG TOXICITY
Term
What happens when antacids and digoxin are mixed?
Definition
They decrease digitalis absorption
Term
What is the normal dig level range?
Definition
0.5-2.0 ng/ml
Term
What are the symptoms of dig toxicity?
Definition
N/V
Bradycardia
H/A
Blurred Vision
Halos
Confusion
Term
What is the antidote for dig tox?
Definition
Digibind. Combines with Dig and excretes it.
Term
What are the first line drugs to treat heart failure?
Definition
INOTROPIC AGENTS (dopamine and dobutamine).

Vasodilate, increase SV, and cardiac output.
Term
What other drugs are used to treat CHF?
Definition
-ACE inhibitors
-ARBs
-Diuretics
-Beta Blockers
-Vasodilators
-CCBs
-Phosphodiesterase Inhibitors
Term
What is the action of vasodilators?
Definition
decrease venous blood return to the heart= decrease in cardiac filling, ventricular stretching (preload), and oxygen demand on the heart.
Term
What is the action of arteriolar dilators?
Definition
reduce cardiac afterload, which increased cardiac output; dilate the arterioles of the kidneys which improves renal perfusion and increases fluid loss; improves circulation to the skeletal muscles.
Term
What assessments should be made while giving Digoxin?
Definition
Drug and herbal history.

If taking dig and a K-wasting diuretic or cortisone drug, hypokalemia might result, causing digitalis toxicity. A low serum potassium level enhances the action of digoxin. If taking a thiazide or cortisone with digoxin, take a potassium supplement.

Baseline HR, apical HR for 1 full minute and should be greater than 60 beats/min.

kidney dysfunction can effect excretion of dig.
Thyroid dysfuntion can alter metabolism of dig- hypothyroid may need to decrease dose, hyperthyroidism may need to increase dose.
Term
What planning should be done while giving Digoxin?
Definition
check HR daily prior to giving dig, if less than 60 report, eat diet high in K, avoid taking with antacids may decrease absorption, stagger doses.
Term
What teaching and interventions should be done while giving digoxin?
Definition
teaching, hold for HR less than 60, determine signs of peripheral and pulmonary edema, monitor dig levels (0.5-2ng/mL) greater than 2 is dig toxicity, monitor K levels (3.5-5.3 mEq/L) report less than 3.5
Term
What is angina pectoris? What is its cause?
Definition
Cardiac pain. Caused by inadequate flow of blood to the myocardium due to plaque occlusion in coronary arteries and spasms of the coronary arteries.
Term
What is classic (stable) angina?
Definition
Occurs w. stress or exertion
Term
What is unstable (pre infarction) angina?
Definition
Occurs frequently over the day with progression of severity
Term
What is variant (spasmodic) angina?
Definition
Occurs during rest
Term
What are the 4 steps to treating classic angina pectoris?
Definition
1.) Nitrates
2.) Nitrates + Beta Blockers
3.) Nitrates + Beta Blockers + Calcium Channel Blockers
4.) Coronary artery bypass graft
Term
What are the 3 steps in treating variant angina pectoris?
Definition
1.) Nitrates OR Calcium Blockers
2.) Nitrates AND Calcium Blockers
3.) Coronary artery bypass graft
Term
What are the non pharmacological ways to treat angina?
Definition
Avoid heavy metals, smoking, extremes in weather changes, strenuous exercise, and emotional distress.

Proper nutrition, moderate exercise, adequate rest, and relaxation techniques.
Term
How do antianginals work?
Definition
Decrease the workload of the heart and promotes vasodilation.
Term
What is nitrate? How does it work?
Definition
ANTI-ANGINAL.

Vasodilates, decreases preload and contraction by relaxing smooth muscle, increases O2 supply but decreases the demand for it.
Term
How can nitrates be given? What are its side effects?
Definition
Sublingual, topical, oral, inhaled, IV.

H/A, hypotension, dizziness, reflex tachycadia if its given too rapidly.

DO NOT GET NITRATE OINTMENT ON FINGERS.
DO NOT USE DEFIBRULATOR PADS ON TOP OF PATCHES -> SKIN BURNS MAY RESULT
Term
What is a beta adrenergic blocker? How does it work?
Definition
ANTI-ANGINAL.

They are non selective/selective. Decreases the need for oxygen by decreasing the heart rate. Decreases after load.
Term
What is a calcium-channel blocker? How does it work? S/E?
Definition
ANTI-ANGINAL

Decreases cardiac demand, relax arteriole spasms and relaxes the smooth muscle in the arteries.

H/A
Hypotension
Dizziness
Flushing
Term
What is a beta blocker? How does it work?
Definition
ANTI-ANGINAL/DYSRHYTHMIC/HYPERTENSIVE

Decreases HR and myocardial contractility by blocking epinephrine and norepinephrine (sympathetic nervous system) which reduces the need and anginal pain.

Drugs end in OLOL.
Term
What is the choice drug for treating classic angina?
Definition
Selective beta blockers.
Term
Who should't use beta blockers?
Definition
Clients with decreased HR, BP or second or third degree AV blocks cannot take beta blockers.
Term
What do non-selective beta blockers do?
Definition
cause bronchoconstriction, and impotence
Term
What do cardioselective beta blockers do?
Definition
act on beta1 receptor which decrease HR but avoids bronchoconstriction because of their lack of activitiy in beta 2.
Term
What are some calcium channel blockers?
Definition
Amlodipine (Norvasc), bepridil HCl (Vascor), diltiazem HCl (Cardizem), felodipine (Plendil), isradipine (DynaCirc), nicardipine HCl (Cardene), nifedipine (Procardia), nisoldipine (Sular), verapamil HCl (Calan, Isoptin)
Term
What is CCB's action?
Definition
CCB’s relax coronary artery spasm (variant angina), and peripheral arterioles (stable angina), and decreasing cardiac O2 demand.
Also, decrease contractility (negative inotropic effect that relaxes smooth muscle), decreases afterload, decreases peripheral resistance and reduces the workload of the heart, which decreased the need for o2.
Verapamil, nifedipine, and diltiazem (cardizem) are effective for long-term treatment of angina.
Term
What are the side effects of CCB? What should you monitor?
Definition
Side effects: Headache, bradycardia, hypotension (more common with diltiazem). Peripheral edema may occur. Monitor changes in liver and kidney function.
Term
What is natriuresis?
Definition
Sodium loss in the urine
Term
What is oliguria?
Definition
Marked decrease in urine output
Term
What is diuresis?
Definition
Increased urine flow
Term
Where do osmotics, mercurial, and carbonic anhydrase inhibitors work on the kidneys?
Definition
The proximal tubule
Term
Where do loop diuretics work?
Definition
The loop of henle
Term
Where do thiazides work?
Definition
The distal tubule
Term
Where do potassium sparing diuretics work?
Definition
Collecting tubule
Term
Where is 99% of Na filtered through reabsorbed?
Definition
The glomerulus
Term
What do diuretics do?
Definition
Inhibit the sodium from being reabsorbed before excretion.
Term
What are diuretics used for?
Definition
Decrease hypertension or edema by producing diuresis and inhibiting reabsorption of sodium and water in the kidney tubules.
Term
Are thiazides taken alone or in combo?
Definition
combined w/ other drugs for hypertension
Term
What are diuretics antihypertensive effect?
Definition
promote Na and water loss by blocking Na and chloride reabsorption, causing fluid volume loss, lowering BP
Term
How does inhibiting reabsorption of sodium and water decrease hypertension or edema?
Definition
Causes fluid volume loss therefore lowers BP.
Term
If diuretics cause loss of sodium, could they also cause loss of other electrolytes such as potassium?
Definition
Yes.
Causes loss of Na, K, Magnesium, chloride, and bicarbonate.
Term
What are potassium-wasting diuretics? What 4 drugs fall into this category?
Definition
Allow potassium to leave the body.

-Thiazide and thiazide-like
-Loop or high-ceiling
-Osmotic
-Carbonic-anhydrase inhibitor
Term
What are potassium-sparing diuretics? How are they used?
Definition
Keep potassium in the body. Used in combination.
Term
What do you need to have in order to take thiazide or thiazide-like drugs?
Definition
Normal renal fxn to be effective.
Term
How do thiazides work?
Definition
Vasodilation, lower BP, promote Na and Chloride and water excretion, resulting in decrease in vascular fluid volume and decrease in cardiac output and blood pressure.
Term
What serum abnormalities are associated w/ thiazide/thiazide-like drugs?
Definition
Hypokalemia- low potassium (dig tox)
Hypomagnesemia- low magnesium
Hypercalcemia- high calcium (dig tox)
Hypochloremia- low chloride
Hyperuricemia-elevated serum uric acid level
Hyperglycemia-high glucose (use cautiously in diabetics)
Hyperlipidemia- elevated blood lipids
Term
What can thiazides be combined with to treat hypertension?
Definition
be combined with ACE inhibitors, beta blockers, alpha blockers, and angiotensin II blockers and centrally acting sympatholytics to control HTN.
Term
What lab levels should be noted when administering thiazides?
Definition
Elevated BUN
Creatinine
Oliguria

Monitor electrolytes: K, Na, Ca, Mag, BG levels, lipid levels; s&s of hypokalemia- muscle weakness, leg cramps, cardiac dysrhythmias.
VS, I & O, weight, edema
Term
What drug history is important when administering thiazides?
Definition
digoxin (hypercalcemia, hypokalemia, hypomagnesemia may cause dig toxcity), corticosteroids ( causes Na retention and K excretion= hypokalemia), antidiabetics (thiazides affect metabolism of carbs= hyperglycemia), ginkgo (may increase BP when taken with thiazide diuretics), licorice (may increase K loss= hypokalemia)
Term
Which type of diuretic has the highest diuretic potential?
Definition
Loop diuretics
Term
What serum level changes are associated with loop diuretics?
Definition
Hypokalemia, hyponatremia, hypocalcemia, hypomagnesemia, hypochloremia
Hyperglycemia may occur in diabetic people
Hyperuricemia
Elevated BUN and creatinine
Elevated lipids
Term
How should thiazides and loop diuretics be used?
Definition
Loop diuretics are less effective as antihypertensive agents than thiazides. Thiazides should be tried 1st and loops should not be prescribed if thiazides work to alleviate body fluid excess.
If Lasix is not effective alone, thiazide may be added, but lasix should never be combined with another loop diuretic
Term
What is the MAJOR difference between thiazide and loop serum levels?
Definition
THIAZIDE = HYPERCALEMIC
LOOPS = HYPOCALEMIC
Term
If someone has a sulfa drug allergy, what can they not take?
Definition
Lasix or Bumex. Ethacrynic acid can be taken instead.
Term
Lasix and Bumex are what kind of drug?
Definition
Sulfonamide
Term
How do osmotic diuretics work? Mannitol
Definition
increase the osmolality (concentration) and sodium reabsorption in the proximal tubule and loop of Henle. Causes Na, Chloride, K, and water excretion.
Term
What are osmotic diuretics used for? Mannitol
Definition
prevent kidney failure, to decrease intracranial pressure (ICP) and to decrease intraocular pressure (IOP). Can be used with chemotherapy drugs
Term
What are the side effects of osmotic diuretics? Mannitol
Definition
Fluid and electrolyte imbalance
Tachycardia from rapid fluid loss
Term
Who should not use osmotic diuretics?
Definition
clients with heart disease and HF. Immediately discontinue if client develops HF or renal failure.
Term
What are potassium sparing diuretics?
Definition
A mild diuretic that DOES NOT PROMOTE POTASSIUM LOSS IN URINE
Term
What are the effects P.S. diuretics have on the body? Aldactone
Definition
Hyperkalemia (do not need K replacements)
Effects when given with ACE inhibitors
Term
What should you monitor while administering p.s. diuretics? Aldactone
Definition
Checking for signs of hyperkalemia
Monitoring serum potassium levels
Urine output (report: less than 30ml/hr or less than 600ml/day)
Term
What should you not use while taking a P.S. diuretic? Aldactone
Definition
ACE inhibitors or ARBs
Term
How are P.S. diuretics taken? Aldactone
Definition
They are used in combination to reduce fluids and Na, combined with potassium-wasting diuretic (hydrochlorothiazided or a loop diuretic)
Term
What happens when a loop or a thiazide and a P.S. diuretic are combined?
Definition
Intensifies the diuretic effect and prevents potassium loss
Term
What is aldactazide?
Definition
aldactone and hydrochlorothiazide
Term
What is moduretic?
Definition
Amiloride and hyrdochlorothiazide
Term
What is dyazide/maxzide?
Definition
Triamterene and hydrocholrothiazide
Term
A patient is taking furosemide (Lasix) 40 mg daily for
heart failure and hypertension. Fluid and electrolyte
imbalances are the most common side effects of
furosemide. Electrolyte imbalances that could occur
and should be monitored include:
Definition
low serum potassium, sodium, magnesium, and calcium.
Term
What contributing factors are known to cause hypertension?
Definition
Family history
Hyperlipidemia
African-American
Diabetes (DM)
Obesity
Aging
Stress
Alcohol, smoking
Term
How do the kidneys regulate BP?
Definition
The renin-angiotensin-aldosterone system:

Renin from the kidney stimulates production of angiotensin II (a potent vasoconstrictor), which causes the release of aldosterone (hormone that promotes sodium and water retention). This fluid increase caused HTN.
Term
What are barorecptors?
Definition
Pressure receptors in the aorta and the carotid sinus that regulate BP with Norepinephrine and epinephrine increase BP through vasoconstriction.
Term
________ center in the medulla also controls BP.
Definition
Vasomotor
Term
How does ADH regulate BP?
Definition
ADH stimulates the kidney to conserve and retain water when there is a fluid volume deficit.
When there is fluid overload, ADH is inhibited and the kidneys will excrete more water.
Term
What are some physiologic risk factors associated with hypertension?
Definition
Excess fat and carbohydrate intake
Alcohol increases renin secretions=increase AngiotensinII=vasoconstriction
Obesity affects cardiovascular system
Nonpharmacologic control of hypertension: wt loss, Na restriction
Term
What is normal BP?
Definition
Systolic: <120
Diastolic: <80
Term
What is prehypertensive?
Definition
Systolic: 120-139
Diastolic: 80-89
Term
What is Stage 1 Hypertensive?
Definition
Systolic: 140-159
Diastolic: 90-99
Term
What is Stage 2 Hypertensive?
Definition
Systolic: >160
Diastolic: >100
Term
What are the antihypertensive drug categories?
Definition
-Diuretics
-Sympatholytics
-Direct Acting Arteriolar Vasodilators
-Angiotensin-Converting Enzyme (ACE) inhibitors
-Angiotensin II receptor blockers (ARBs)
-Direct Renin Inhibitor
-Calcium Channel Blocker
Term
What are the sympatholytic drugs?
Definition
-Beta Adrenergic BLockers
-Centrally ACting Alpha 2 Agonists
-Alpha Adrenergic Blockers
-Adrenergic Neuron Blockers
-Alpha 1 Adrenergic Blockers
-Beta 1 Adrenergic Blockers
Term
Alpha 1 = ?
Definition
Blood vessels
Term
Beta 1 = ?
Definition
Heart
Term
Beta 2 = ?
Definition
Lungs
Term
Non-cardioselective beta blockers work how? Propranolol
Definition
HR decreases, with continued use-B/P decreases, BRONCHOCONSTICTION due to bronchiospasm
Term
Who should not use non-cardioselective beta blockers? Propranolol
Definition
chronic obstructive pulmonary disease (COPD) patients
Term
Cardioselective beta blockers work how? Atenolol, Bisoporolol, Metoprolol.
Definition
Binds to beta-1 adrenergic receptor site and prevents the release of catecholomine.
Term
Who should not use a cardio beta blocker?
Definition
clients with diabetes mellitus when taking beta blockers due to inhibits liver’s ability to convert glycogen to glucose
Not to be used with heart block or bradycardia.
Term
Beta Blockers are used in combination with a ________ for HTN. They are more effective in clients with an elevated serum _______ level.
Definition
Diuretic. Renin.

There is a greater hypotensive response in clients with higher renin levels!
Term
What are the side effects of beta blockers?
Definition
marked decrease in blood pressure, insomnia, depression, nightmares, sexual dysfunction
Term
What happens if you abruptly stop taking beta blockers?
Definition
rebound hypertension may result or MI
Term
How do centrally acting alpha 2 agonists work? Methyldopa
Definition
decrease sympathetic response from the brainstem to the peripheral vessels

stimulate alpha2 receptors+ decrease sympathetic activity, increases vagus activity (slows things down)= decrease cardiac output, decreases serum epinephrine, norepinephrin ,and renin release= reduce peripheral vascular resistance, increase vasodilation. Minimal affect on kidney blood flow.
Term
What are the side effects of centrally acting alpha 2 agonists?
Definition
sodium and water retention, dry mouth, bradycardia
Term
Who should not use centrally acting alpha 2 agonsts?
Definition
impaired liver function
Term
Why are diuretics prescribed with centrally acting alpha 2 agonists?
Definition
prescribed to avoid fluid retention
Term
Why are beta blockers not given with centrally acting alpha 2 agonists?
Definition
accentuates bradycardia and rebound HTN when d/c.
Term
How do alpha adrenergic blockers work?
Definition
Blocks the alpha-adrenergic receptors, resulting in vasodilation and decreased blood pressure
Term
Are alpha blockers selective or nonselective?
Definition
Can be selective or non-selective:

Nonselective alpha blockers are for acute hypertension
Selective alpha blockers are for long-term hypertension
Term
Why are alpha blockers useful in patient's with lipid abnormalities?
Definition
decreases LDL increases HDL
Term
What are some alpha blockers?
Definition
Doxazosin mesylate (Cardura)
Prazosin HCl (minipress)
Terazosin HCL (hytrin)
Term
Why are diuretics prescribed with alpha blockers?
Definition
Causes sodium and water retention with edema; diuretics may be given.
Term
Direct acting arteriole vasodilators?
Definition
POTENT anti-hypertensive.
Term
When are nitropuside and diazoxide used? (D.A. arteriolar vasodilator)
Definition
Acute hypertensive emergencies
Term
What are the side effects of direct acting arteriolar vasodilators?
Definition
Reflex tachycardia
Palpitations
Restlessness
agitation
confusion
hyperglycemia (diazoxide)
Term
How do ACE inhibitors work?
Definition
inhibits angiotensin –converting enzyme (ACE). ACE causes vasoconstriction which in turn , blocks release of aldosterone, (aldosterone promotes Na retention and K excretion.
Term
What are some ACE inhibitors?
Definition
BenazePRIL HCl (lotensin)
EnalaPRIL Maleate (Vasotec)
Term
What is the #1 s/e of ACE inhibitors?
Definition
IRRITATING COUGH
Term
What happens when aldosterone is blocked?
Definition
Na and water are excreted and K retained
Term
ACE inhibitors _________ peripheral resistance.
Definition
LOWER
Term
What clients use this drug? What can it be co-prescribed with?
Definition
Elevated renin levels.

Calcium Channel Blockers.
Term
How do ARBs work?
Definition
Blocks Angiotension II from the receptors in tissues causing vasodilation

prevent the release of aldosteron ( sodium-retaining hormone). They act on the renin-angiotensin-aldosterone system.
Term
Do ARBs cause an irritating cough like ACE inhibitors/
Definition
NO!
Term
What are some ARBS?
Definition
Losartan (Cozaar)
Valsartan (Diovan)
Irbesartan (Avapro)
Term
What are some side effects of CCB?
Definition
May cause edema r/t vasodilator effect, persons with edema may take another anti-HTN med.
Term
Why can't BB and CCB be used together?
Definition
both drugs decrease myocardium contractility.
Term
What are some examples of CCB?
Definition
Verapamil (Calan)
Nefedipine (Procardia)
Amlodipine (Norvasc)
Term
Why can;t you drink grape fruit juice w/ ccb?
Definition
Intensify their effect on the body
Term
CB’s blood pressure (BP) is 142/82. The health care
provider prescribed a diuretic to lower his BP. CB
asks, “Why the diuretic?” Your answer could be:
Definition
Your systolic blood pressure indicates you have stage 1 hypertension.”
Term
CB’s diuretic was changed to an angiotensin II receptor blocker (ARB). An example of an
Definition
valsartan (Diovan).
Term
A common side effect of an ARB is
Definition
dizziness
Term
Which anti-hypertensive drug is more effective for AA individuals?
Definition
Calcium channel blockers
Term
What are african americans more susceptible to?
Definition
Low-renin hypertension
Term
Why do beta-blockers not work on african americans?
Definition
They require high renin levels
Term
Why do ace inhibitors not work on african americans?
Definition
The renin-angiotensin is NOT the problem.
Term
What do work well in african americans?
Definition
Diuretics, calcium blockers, alpha 1 blockers, and diuretic combination drugs work well in AA
Supporting users have an ad free experience!