Cardio Drugs Flashcards
the stretch of the heart
preload
the squeeze of the heart muscle
afterload
When preload and afterload are decreased =
blood pressure decreases
- assess how well the body is being perfused by blood carrying oxygen and nutrients
blood pressure
the mean (average) perfusion pressure across the entire cardiac cycle
Mean Arterial Pressure (MAP)
blood pressure and ___ help determine how well the body is perfusing
MAP
Blood pressure consistently over 140/90
Most common disease
hypertension
Diuretics
adrenergic drugs
Vasodilators
angiotensin-converting enzyme (ACE) inhibitors
angiotensin receptor blockers (ARBs)
calcium channel blockers (CCBs)
and direct renin inhibitors.
Risk factor for multiple diseases
most people have_________hypertension, and it means there is a cause that they are not aware of
essential
______ hypertension is due to a disease that is causing the high blood pressure
secondary
if person have 140/90 multiple times they will usually __________
start medication
Decreases Sympathetic response
2. Less norepinephrine released
Slower heart rate
Less force of contraction
Vasodilation
Less renin released
Equals less cardiac output (Blood pressure drops)
centrally acting alpha 2 adrernergics
works directly on the part of the brain that lowers blood pressure
renin is an enzyme that when decreased causes decreased bp
centrally acting alpha 2 adrenergics
What are the centrally acting adrenergics?
clonidine
methyldopa
Some Types of heart failure
Use with an MAOI
When Breastfeeding
contraindications with centrally acting adrenergics
Recent myocardial Infarction
Diabetes Mellitus
Peptic Ulcer
HX of stroke, asthma, COPD, diabetes mellitus, major depressive disorder, or chronic kidney disease.
cautions with centrally acting adrenergics
Reduce Hypertension (hTN)
Primary HTN
Manage symptoms of heart failure
indications for centrally acting adrenergics
bradycardia
Orthostatic hypotension/Dizziness
Drowsiness, sedation
Dry mouth
Rebound htn when discontinued
adverse effects of centrally acting adrenergics
Might be given twice a day
is often given at bed time instead bc it causes drowsiness
slows pulse
monitor “tilt” blood pressures –laying down, sitting up, and standing measure the bp in these positions
usually not the first choice medication to treat high bp
reflex tachycardia is also a symptom but is less common than bradycardia
notes/ adverse effects for centrally acting adrenergics
Fall and injury risks from hypotension, dizziness, lightheadedness
Routes include oral, epidural, and transdermal
usually administered BID in divided doses
May take larger dose at bedtime to decrease daytime sleepiness
Report heart rate less than 60 bpm to physician
avoid excessive alcohol use
Avoid abrupt discontinuation of medication
patient education for centrally acting adrenergics
hypertension does not make you feel bad, but it may give you a ________, a lot of people do not have any symptoms
headache
when is the best time to give clonidine (or the higher dose if BID?)
bedtime
CAAS (Clonidine/aldomet) cause what affect on the heart rate?
bradycardia
Fluid volume excess in joints, peripheral limbs, surrounding the cell
edema
excess fluid loss
dehydration
most edema is ?
peripheral (in the legs)
What is normal potassium levels?
3.5-5
Anything less than ___ is hypokalemia
3.5
anything over ____ is hyperkalemia
5
Hypotension
General Weakness & Fatigue
Muscle cramps
Constipation, N/V
Irritable, confused
Arrhythmias/tachycardia
Shallow respirations
s/s of hypokalemia
General Weakness
Muscle fatigue, twitches, cramps, up to paralysis
paresthesia
Abdominal cramps, distention, Nausea, Diarrhea
Irritable, anxious
Arrhythmias/hypotension
hyperkalemia
________ is pin and needle feelings in your hands and feet
paresthesia
if you are to the ______, there is a MAJOR problem with hyper and hypokalemia
arrhythmias,
if they have ______ they can have muscle twitches
hyperkalemia
both _____ and ____ cause GI issues
hyper and hypokalemia
Essential for nerve impulse conduction
Regulates acid/base balance
potassium
Give _______ for hyperkalemia
Kayexalate
sodium bicarbonate
What happen if the nurse gives potassium IV as a bolus dose?
its fatal!!!!!!!!
Give _________ for hyperkalemia can be given PO or enema, pulls potassium out into GI lumen and causes diarrhea
kayexalate
Give kayexalate for ______ can be given PO or enema, pulls potassium out into GI lumen and causes diarrhea
hyperkalemia
t/f: NEVER GIVE POTASSIUM IV BOLUS OR FAST IV PUSH
true
Dilute iv dose with saline
no more than 40 meq/l at a time
no faster than 10 meq/hr
admin instructions for potassium
GI related
Diarrhea
Nausea
Vomiting
Adverse-
GI bleeding
Ulceration
IV fluid- has to be mixed to a certain concentration to give safely
IV infusion causes discomfort
adverse effects of potassium
when given too fast, it causes cardiac arrest
IV infusion can discomfort [possible thrombophlebitis]
potassium
Complex syndrome that impairs cardiac functioning decreased cardiac output
heart failure
Dyspnea
Fatigue
Fluid retention (peripheral edema)
Pulmonary edema (fluid lungs)
Reduced ability to exercise
Persistent cough or wheezingwith white or pink blood-tinged phlegm
Increased need to urinate at night
Swelling of abdomen (ascites)
Sudden weight gain from fluid retention
Lack of appetite/nausea
s/s of heart failure
occurs when your heart muscle doesn’t pump blood as well as it should. Certain conditions, such as narrowed arteries in your heart (coronary artery disease) or high blood pressure, gradually leave your heart too weak or stiff to fill and pump efficiently
congestive heart failure
What are the two medication classes used to treat heart failure?
cardiac glycosides
diuretics
what are the cardiac glycosides?
digoxin
what are the diuretics
Thiazide diuretics-hydrochlorothiazide (HCTZ)
Loop diuretics- furosemide
Potassium-sparing diuretics- spironolactone
Osmotic diuretics-Mannitol
calculation that determines how well the blood is filtered by the kidneys
glomerular filtration rate
measures the amount of the waste product creatinine
Serum creatinine/creatinine clearance
anytime you give a med that is going to pull fluid off you need to know the
GFR and Serum creatinine clearance level
Works on the nephron
Block na and h2o reabsorption
Cause Direct arteriolardilation decreases peripheralvascular resistance
Reduces extracellular fluid volume, plasma volume, and cardiac output decrease in BP
diuretics
What are the different diuretic classes?
loop diuretics
mannitol (osmotic diuretic class)
metolozone (thiazide-like diuretic class)
thiazides
potassium sparing diuretics
the osmotics you don’t need to know as much about them bc most of the time ______ is given in the ICU for increased intracranial pressure
mannitol
Dehydration
electrolyte imbalance
muscle cramps
dizziness
adverse effects of all diuretics