what is the main purpose for a Phosphodiesterase Inhibitors?
increase cardiac output
Phosphodiesterase Inhibitors decrease what?
Ventricular afterload
Use Phosphodiesterase Inhibitors in what situation?
short term for severe heart failure not controlled by digoxin
Phosphodiesterase Inhibitors can increase the rate of what?
heart arrythmias
Need to be alert for what when giving Phosphodiesterase Inhibitors?
severe HYPOtension
give two Phosphodiesterase Inhibitor examples.
Inocor and primacor
how are inocor and primacor administered?
IV bolus and continuous drip
three adverse side effects with Phosphodiesterase Inhibitors
thrombocytopenia, N/V, abdominal pain
what is used to control edema associated with CHF
diuretics
vasodilators will decrease what?
afterload
Angina pectoris
ischemia of the heart
Ready to give up?
Never!!!!!
Classic angina
AKA: stable angina or exertional angina. just what the name implys
Levines sign?
clenched fist placed over sternum when having chest pain.
unstable angina
): Angina that has a changing intensity and seems to involve rupture of atherosclerotic plaques with accompanying formation of thrombi. It comes at decreasing levels of exertion and often at rest.
pts with unstable angina are most likely to have what?
a big MI
Prinzmetal's angina
AKA: variant angina; A form of angina caused by spasms of the large coronary arteries during which blood flow through the constricted arteriole is reduced. It has no relationship to exercise
Prinzmetals angina or variant angina occurs more frequently when?
the morning.
Organic Nitrovasodilators do what?
produce vasodilation
what do you always check before giving Organic Nitrovasodilators?
blood pressure
What is most common Organic Nitrovasodilator side effect
hypotension
what are some less common Organic Nitrovasodilator side effects?
headache and flushing that will disapear after a few days
Isordil is what?
a Organic Nitrovasodilator
Ismo is what type of drug?
Organic Nitrovasodilator
what is the prototype Organic Nitrovasodilator drug?
nitrogylcerine
give three Organic Nitrovasodilators
nitroglycerine; Isordil; Ismo
how can Organic Nitrovasodilators be used?
prophylactically or acute episodes
how is nitroglycerine adminstered?
sublingual
how often is nitro administered?
q 5 mins x3
the spray nitro goes where?
also sublingual
how else can nitro be administered?
patch
do you ever use your fingers on the nitro patch?
nope use the papers it come with.
what do you want to do to nitro patch sites
rotate 'em
do you put the nitro patch on dry, cracked, or hairy skin?
noper
what do you do to the nitro patch at night?
remove it
can you wear the nitro patch in the water?
sure can.
Can nitro be given IV?
you betcha
what are some reasons for nitro given IV?
emergency control of BP, and relief from chest pain.
if using nitro drip to control bp, how do you do it?
titrate up until patient has loss of chest pain or untill loss of systolic bp of 20
what do you mix nitro drip in ?
glass bottle
why do you use a glass bottle and plastic tubing when giving nitro drip?
plastic absorbs the drug
how often do you replace a nitro drip set?
q24H
If pt has other iv lines, where do you put the nitro drip?
in a seperate site.
What do you not do after taking nitro?
smoke
store the nitro tablets where?
cool dry dark place
nitro pills good for how long after opening
6 months
What can't someone do after taking nitro?
Smoke
what effect does aspirin provide?
antiplatelet
What is the dosage for the antiplatelet effect of aspirin?
81-325mg
Antilipidemics do what?
decrease serum cholesterol
antihypertensives do what?
lower blood pressure
what do beta blockers do?
decrease heart rate and BP therby decreasing cardiac workload and oxygen demand.
what are beta blockers used for?
Long term management of severe angina attacks
beta blockers are contraindicated when?
bradyarrythmias and heart block
What is the action of calcium channel blockers?
dilate the coronary and peripheral arteries to decrease cardiac workload
monitor what four things when giving calcium channel blockers?
blood pressure, pulse, I&O and weight
The four symptoms watched for when giving calcium channel blockers are indicitive of what condition?
fluid retention
What is viagra?
a vasodilator
what is viagra used for?
erectile dysfunction
What will viagra and the ingestion of nitrates cause
MI
what does Nitropress do?
dilates the arterial and venus smooth muscles
what route is Nitropress given?
IV only
You want to protect the NItropress container from what?
Light
Nitropress will decrease what?
B/P
How fast will nitropress decrease B/P
extremely rapidly
what do you monitor when giving Nitropress
B/P
When is hyperstat given?
hypertensive emergencies
How is hyperstat administered
IV
Rogaine is used for what?
Long term management of hypertension
what is one side effect of rogaine
hair growth
two drugs used in conjunction with other drugs to treat hypertension are what?
rogaine and apresoline
define action potential.
The opening and closing of different ion channels in cardiac muscle cells which allows sodium and calcium to move into cells triggering contraction of the muscles.
What is an arrythmia?
changes from the normal pattern of heart beat
define atrial flutter.
A very rapid, rhythmic pattern of contractions
what is an ectopic pacemaker?
Abnormal pacemakers that may develop when the heart is damaged or diseased or after treatment with certain drugs
What drugs can cause an ectopic pacemaker?
digoxin or high doses of catecholamines
define Paroxysmal supra-ventricular tachycardia
A rapid rhythm that begins abruptly with a premature atrial or junctional beat.
define a Premature ventricular contractions
An arrhythmia in which the ECG pattern shows a normal pattern of P followed by QRS, then an abnormal QRS that does not follow a P wave
what is a proarrythmia?
The effect of causing very serious arrhythmias from drugs that were supposed to prevent serious arrhythmias
what class of drugs can cause a proarrythmia?
Class 1 antiarrythmatic drugs
what drugs can cause a proarrythmia?
Flecainide and moricizine
define the Refractory period
The period of inexcitability in which cells cannot cause another action potential because the channels have not reset.
define Slow response tissue.
Tissue of the AV and SA nodes which have only the slow calcium channels operating in their cells.
what is a Supraventricular tachyarrhythmia?
Arrhythmias that originate above the ventricles and involve a high atrial rate
give some examples of a supraventricular tachyarrhythmia.
artrial flutter, atrial fibrillation and paroxysmal supra-ventricular tachycardia
what is Torsades de pointes?
A potentially deadly arrhythmia consisting of ventricular tachycardia at rates so fast that the blood pressure falls sharply, resulting in fainting. They may progress to ventricular fibrillation.
What can Torsades de pointes turn into?
Ventricular fibrilation
what can cause Torsades de pointes to turn into V-fib?
potassium channel blockers
what is Wolff-Parkinson-White syndrome?
An anatomically defined arrhythmia in which impulses pass through a physical connection other than the AV node; this faster accessory pathway along with the slower AV node causes a premature beat. May be caused by “reentry”.
what are four possible causes for reccurent arrythmias?
excess sodium, caffeine, nicoteine, Alchohol use
What does the drug class of antiarrythmic drugs signifiy?
the rate the drug molecules unbind with the sodium channels
Class I antiarrythmics are also called what?
sodium channel blockers
Sodium channel blockers are used to treat what?
PVC, SVT, V-Tach, and prevention of V-fib
what are sodium channel blockers mainly used for today?
prevention of life threatening ventricular arrythmias
sodium channel blockers do what?
prevent the absorption of sodium by the cells.
what is the major effect of sodium channel blockers?
slow the rate of conduction of the cardiac impulse through atrial and ventricular muscles
there are how many subclasses of class 1 antiarrythmics?
3
Most class 1 antiarrythmics are given how
PO
what is the one sodium channel blocker that is not given PO?
lidocane
why is lidocaine not given PO?
absorbed to rapidly
What is the prototype for class 1 anytiarrythics?
Quinidine
Quinidine does what?
maintains sinus rythm
give 3 adverse affects of Quinidine
stomach pain, loss of appetite, diarrhea
what is Porcainamide?
Class 1 antiarrythmic
what is Porcainamide used for?
prevent the recurrence of atrial fibrillation
Give two drugs that are Procainamide.
Pronestyl and Procanbid
What is one major side effect to Procainamide?
a sydrome resembling lupus
What is Porcainamide similar to?
Similar in action and use to Quinidine
What is an adverse effect of Norpace?
anticholenergic effect.
Class 1B antiarrythmics have a fast rate of what?
unbinding of sodium
Class 1-B Sodium Channel Blockers are used to treat what?
PVCs, V-tach, and to prevent V-fib
What is the prototype for Class 1-B Sodium Channel Blockers?
Lidocaine
Lidocaine used to be the drug of choice for what?
ventricular arrhythmias
What do you need to figure out about lidocaine by looking on the label?
what it is used for: cardiac arrythmias or local anesthesia
What is the pattern of dosage for lidocaine IV thearpy?
• Start with a bolus injection of 50-100 mg over 2 minutes. Then a continuous infusion of 1-4 mg/min
Use lidocaine with caution in what kind of patients?
liver disease patients
Give seven adverse effects of lidocaine.
Dizzyness, nervousness, drowziness, muscle twitching, confusion, disorientation and seizures
What is Mexitil similar to?
lidocaine
how is Mexitil given?
PO
What is Tonocord similar to?
lidocaine
how is Tonocord given?
PO
What does a patient taking Tonocord need to do?
set alarm clock to dosages, must stay steady in system
Class 1-C Sodium Channel Blockers do what?
slow rate of sodium unbinding from the cells
What are Class 1-C Sodium Channel Blockers use to treat?
life threatening V-tach, V-fib, and SVT unresponsive to other drugs
Two oral Class 1C sodium channel blockers that may cause new arrythmias are?
Tambocor and Rythmol
Class II antiarrythmics are also called what?
Beta Blockers
Suffix for beta blockers is?
-olol
Beta blockers are used to treat what?
heart failures
Acebutolol (Sectral) is given how?
PO
Acebutolol (Sectral) is given to treat what?
ventricular arrhythmias caused by exercise
Esmolol (Brevibloc) is given how?
IV
Esmolol (Brevibloc) is given for what?
• Usually given for SVT (supraventricular tachycardia)during anesthesia or surgery
Propranolol (Inderol) is given how?
PO and IV
PO Propranolol (Inderol) is given to prevent what?
ventricular arrhythmias caused by exercise
Propranolol (Inderol) would be given IV for what?
life-threatening arrhythmias
What will reverse an Inderal-induced bradychardial arrhythmia?
Atropine
Class III antiarrythmics are called what?
Potassium channel blockers
Class III Potassium Channel Blockers act how?
block the potassium responsible for re-polarization; it prolongs the “action potential”
Class III Potassium Channel Blockers are used for what?
V-tach, V-fib, and to convert A-fib or A-flutter to regular sinus rhythm
What is the major toxic reaction to Class III Potassium Channel Blockers?
torsades de pointe
Amiodarone (Cordarone) is what?
a Potassium channel bocker
Amiodarone (Cordarone) causes what?
liver damage
what must be instructed to avoid when taking Amiodarone (Cordarone)?
sunlight
Bretylium (Bretylol) is what?
a potassium channel blocker
Most common adverse effect to Bretylium (Bretylol) is what?
hypotension
What is Bretylium (Bretylol) used for?
used for PVC if lidocaine is not effective
Bretylium (Bretylol) is given how?
IV
dose patten for Bretylium (Bretylol) is what?
IV loading dose and follow it with a drip or maintenance dose
Ibutilide (Corvert) is what?
a potassium channel blocker
Sotalol (Betapace) is what?
a potassium channel blocker
what is the most common adverse effect of Sotalol (Betapace)?
bradycardia
Class 4 antiarrythmics are also called what?
Calcium Channel Blockers
Calcium Channel Blockers work by what action?
Slows conduction and Decreases the heart rate
Diltiazem (Cardizem) is what?
A calcium channel blocker
Diltiazem (Cardizem) is contraindicated in what?
digitalis toxicity
Verapamil (Calan or Isoptin) is what?
a calcium channel blocker
Verapamil (Calan or Isoptin) does what to the heart rate?
slows it down
what do you not use with Verapamil (Calan or Isoptin)?
Inderol
Asdenosine (Adenocard) is given how
IV Push
Asdenosine (Adenocard) is given IV Push over how long?
1-2 seconds
why is Asdenosine (Adenocard) pushed so rapidly?
half life of only 1-2 seconds.
Asdenosine (Adenocard) can and will have what effect?
stop the heart for one to two seconds
Asdenosine (Adenocard) can but rarely causes what?
A-fib or bronchospasms
Use Asdenosine (Adenocard) with caution in patients with what?
asthma, existing AV block, and unstable angina
Phenytoin (Dilantin) is what?
anticonvulsive
Phenytoin (Dilantin) is used to treat what?
seizures and arrythmias caused by dig.
Side effects for Phenytoin (Dilantin) are what?
slurred speech, tremors, drowsiness, and confusion
What drug do you give for a brady-arrhythmia?
Atropine
What drug do you give for an atrial-fib?
Digoxin
Before giving any of the anti-arrhythmic drugs, always take the patient’s what?
pulse and blood pressure
define Angiotensin-receptor blockers (ARBs)
newest class of antihypertensive drugs which are as effective as ACE inhibitors in lowering arterial pressure and have a superior adverse effects profile
define Angiotensin II
): The result of angiotensin I being converted by angiotensin-converting enzyme, Angiotensin II increases arterial pressure by constricting arterioles and enhancing the release of norepinephrine. Angiotensin II also stimulates the adrenal cortex to inc
define Angiotensin-1 (AT1) receptor
Sites which produce actions important for blood pressure regulation causing vasoconstriction and secretion of aldosterone
define Essential hypertension
Primary hypertension. Characterized by a slow, progressive elevation in blood pressure over several years; cause unknown.
define Preeclampsia
An acute form of hypertension occurring in pregnant women after 24 weeks of gestation and is characterized by proteinuria and edema
what is the Renin-angiotensin system?
The body’s system of regulating blood pressure by a chain of events involving releasing renin from the kidneys to convert angiotensinogen to angiotensin I, conversion of angiotensin I to angiotensin II, which increases arterial blood pressure by constrict
define Secondary hypertension
Hypertension related to underlying renal or endocrine cause; known causes include coarctation of the aorta, pheochromocytoma, etc.
define Resistant hypertension
Diastolic blood pressure readings consistently above 90 mm Hg while under treatment with antihypertensive drugs
define Refractory hypertension
Hypertension that fails to respond to therapy
define Malignant hypertension
Diastolic blood pressure over 140 mm Hg associated with papilledema – a medical emergency
define Isolated systolic hypertension
Systolic blood pressure above 160 mm Hg in patients over the age of 60
Complicated hypertension is what?
Arterial hypertension of any cause where there is evidence of cardiovascular damage related to blood pressure elevation
White coat hypertension is what?
Blood pressure that is elevated when taken by health care provider but normal when measured outside of the health care environment
hypertension is what?
systolic above 140 and diastolic above 90.
give four causes of Cause of secondary hypertension
Cushing’s syndrome, diabetes mellitus, pheochromocytoma, and a variety of drugs