Cardiovascular System Drugs Flashcards
Exam 1
What diuretics do you need to know? What do they help reduce?
High-ceiling loop diuretics
Thiazide Diuretics
Potassium (K) sparing diuretics
Osmotic Diuretics
Reducing fluid volume overload
What do diuretics do?
Increase urine output
What do diuretics eliminate?
Fluids and urinary solutes
How do diuretics affect the reabsorption of sodium?
Decrease reabsorption in renal tubules
What can happen if a large amount of urine is lost due to diuretics?
Hypovolemia
What is a common treatment for hypovolemia caused by diuretics?
0.45% Saline
What is the high ceiling loop diuretic that is commonly used?
Furosemide
What are the other common medications in the high ceiling loop diuretic class?
Methanide & Torsemide
Where do high ceiling loop diuretics primarily work in the kidney?
Loop of Henle
What are the common uses of high ceiling loop diuretics (furosemide)?
Pulmonary edema, liver edema, cardiac edema, kidney disease, and hypertension
What electrolyte imbalance can result from the use of high ceiling loop diuretics?
Hypokalemia
What potential side effect can occur if high ceiling loop diuretics (furosemide/lasix) are administered too quickly?
Hearing damage or tinnitus
What is the recommended maximum rate for pushing (furosemide/lasix)?
20 mg/min NO FASTER!! or you could be causing tinnitus
What are some complications/side effects of high ceiling loop diuretics (furosemide/lasix)?
Dehydration: low blood volume, low blood pressure, increased heart rate
What electrolyte imbalances can be caused by high ceiling loop diuretics (furosemide/lasix)?
Low: sodium, chloride, blood pressure, potassium, calcium, magnesium.
High: glucose, uric acid, cholesterol
What is gout and what is it caused by?
Gout is caused by a build-up of a substance called uric acid in the blood.
furosemide/lasix causes an increased in uric acid buildup
What is the normal range for Potassium?
3.5-5
What is the normal range for Sodium?
135-145
What is the normal range for Calcium?
9-10.5
What is the normal range for Magnesium?
1.3-2.1
What are the symptoms of hypokalemia?
Weakness, Hyporeflexia, Thready pulse, Orthostatic hypotension, Hypoactive bowel sounds & constipation, Nausea/vomiting, St segment depression, Inverted T wave
What are the potential side effects of high-ceiling loop diuretics (furosemide/lasix)? think electrolyte imbalance.
Hyponatremia, hypomagnesemia, hypokalemia, hypocalcemia, decreased urine output, hypotension
What are the signs and symptoms of hyponatremia?
Lethargy, seizures, confusion, coma, nausea, vomiting, headaches
How does hyponatremia occur and how is it tx?
Water overload, treat with fluid restriction
What are the signs and symptoms of hypomagnesemia?
Bradycardia and heart blocks, lethargy, coma, hypotension, hypoventilation, weak-to-absent deep tendon reflexes, nausea, vomiting
What are the signs and symptoms of hypokalemia?
Heart blocks, asystole, ventricular fibrillation, muscle weakness, diarrhea, abdominal cramps
manifestations of HYPOkalemia: N/V, fatigue, leg cramps, general weakness
What are the signs and symptoms of hypocalcemia?
Seizures, muscle cramps, laryngospasm, stridor, tetany, heart blocks, cardiac arrest
What is the threshold for decreased urine output that requires monitoring?
Less than 30 ml/hr or less than 0.5 ml/kg/hr
What are the potential safety concerns with high-ceiling loop diuretics (furosemide/lasix)?
Dizziness and neurological problems related to electrolyte imbalances, fall risk
What should patients monitor while taking high ceiling loop diuretics (furosemide/lasix)?
BP, heart rate & rhythm, and electrolyte imbalance
What precaution should patients take to avoid orthostatic hypotension?
Change positions slowly
What should patients avoid taking with high ceiling loop diuretics (furosemide/lasix)?
Other ear damaging medications
When should patients notify their physician?
If experiencing tinnitus
What types of foods should patients consume while on high ceiling loop diuretics (furosemide/lasix)?
High potassium foods (fish, avocados, banana, orange juice, spinach, potatoes, beans)
What are the contraindications for loop diuretics (furosemide/lasix)?
Pregnant people, anuria (No urine output)
What conditions should loop diuretics (furosemide/lasix) be used cautiously with?
Heart disease, diabetes, dehydration, electrolyte depletion, gout
What medications should be used cautiously with loop diuretics (furosemide/lasix)?
Digoxin, lithium, ototoxic meds, NSAIDs, & other anti-hypertensives
What should be done if the patient does not urinate or potassium is low?
Hold (furosemide/lasix)
What should be done before or during loop diuretic administration (furosemide/lasix)?
Baseline vitals/labs
Why is it important to weigh consistently?
Monitor fluid balance
What should be monitored while a patient is on loop diuretics?
Blood pressure and intake/output
When is the best time to administer loop diuretics?
In the morning to avoid nocturia
Under what condition should loop diuretics (furosemide/lasix) not be given?
If potassium (K) is less than 3.5
What should be done if potassium needs to be replaced before giving the loop diuretic?
Never push potassium
What are potential signs of effectiveness when evaluating a treatment? for frusemide
Decrease in pulmonary edema, decrease in peripheral edema, weight loss, decrease in BP, increase in urine output (initially), decreased calcium level (off label use)
What is the MVP thiazide medication?
hydrochlorothiazide
What is the drug of choice for essential hypertension?
hydrochlorothiazide
What is the only thiazide medication that can be given IV?
Chlorothiazide
Where does a thiazide medication block reabsorption of sodium, chloride, and water?
distal convoluted tubule
What are thiazides (hydrochlorothiazide) used for?
Edema in mild to moderate heart failure, liver, & kidney disease
With which medication can thiazides (hydrochlorothiazide) be prescribed with for BP control?
Lisinopril
Do thiazides reduce urine production for those with diabetes insipidus?
Yes
What condition do thiazides (hydrochlorothiazide) help prevent in postmenopausal women?
Osteoporosis due to reabsorption of calcium that occurs with use of (hydrochlorothiazide)
What are the risks associated with thiazide diuretics (hydrochlorothiazide)?
Dehydration, Hypokalemia, Hyponatremia, Hypochloremia, Hypomagnesemia, Weight loss, Hyperglycemia, Hyperuricemia, Increased lipids
T/F thiazide and loop diuretics have similar risks?
TRUE
What are some signs of burnout in toilets?
Increased demand due to use of (hydrochlorothiazide)
What is the function of potassium sparing diuretics (Spironolactone)?
Block action of aldosterone
What is the MVP of potassium sparing diuretics?
Spironolactone
What is the result of potassium sparing diuretics?
Potassium retention, secretion of sodium and water
What is the purpose of potassium sparing diuretics (Spironolactone)?
Treats hypertension, edema, and is given for heart failure
How are potassium sparing diuretics (Spironolactone) administered?
Orally ONLY
What are the complications of potassium sparing diuretics (Spironolactone)?
HYPERkalemia, endocrine problems, drowsiness, metabolic acidosis, cardiac rhythm problems (PVCs)
What are the symptoms of hyperkalemia?
Elevated T wave (look for cardiac events), muscle weakness, diarrhea, chest pain, palpitations
What is one way to resolve hyperkalemia?
Kayexelate (makes you poop the potassium) with slow results
What is another way to resolve hyperkalemia?
Insulin and dextrose
Because it shifts potassium from the blood into the intracellular fluid. Dextrose helps prevent hypoglycemia (FAST results) (better option)
What is the purpose of using sodium bicarbonate to resolve hyperkalemia?
Helps when body is acidic
How does albuterol help resolve hyperkalemia?
Increases insulin concentration, , so it shifts potassium back to the intracellular space
What is the purpose of using calcium gluconate and calcium chloride during an emergent hyperkalemia situation?
Stabilizes the cardiac cell in the event of an emergent hyperkalemia, but doesn’t actually lower serum potassium (support your EKG with this intervention)
What does the hypothalamus control?
Body temperature, thirst, hunger, and other homeostatic systems
What functions does the pituitary gland help regulate?
Growth, blood pressure and reproduction
What does the pineal gland help with?
Melatonin production
What is the function of the thyroid gland?
Regulates metabolic rate
controlling heart, muscle and digestive function, brain development and bone maintenance.
What does the parathyroid gland regulate?
Levels of calcium and phosphorus
What functions do the adrenal glands regulate?
Metabolism, immune system, blood pressure, response to stress
Where is the pancreas located?
Behind the stomach
What does the pancreas secrete?
Digestive enzymes
What is the function of the ovaries?
Produce oocytes and reproductive hormones
Oestrogen and progesterone
What is the main male hormone produced by testicles?
Testosterone
What should be avoided when taking potassium-sparing diuretics (Spironolactone)?
Salt substitutes that cotaint potassium and foods high in potassium
What is a unique side effect of triamterene?
Blue urine
What is the main benefit of potassium-sparing diuretics?
They help to retain potassium in the body and toilet doesn’t get much potassium
What is the most valuable player (MVP) osmotic diuretic?
Mannitol
What can osmotic diuretics (Mannitol) reduce?
Intracranial pressure, Intraocular pressure
What is the mechanism of action of osmotic diuretics (Mannitol)?
Drawing fluid back into the vascular and extravascular space
Where does osmotic diuretics (Mannitol) pull fluid from the brain?
Into the vascular system
What should be done with unused portions of Mannitol?
Discard unused portions
What may happen if fluid containing Mannitol is chilled?
Crystals may form
What should be done if crystals are observed in the Mannitol container?
Warm to redissolve, then cool to body temperature
What are some common types of blood pressure lowering medications?
ACE inhibitors, beta blockers, diuretics
Which organs work together when there is a drop in blood pressure and volume?
Liver, lungs, kidneys
What is the goal of these organs (liver, lungs, and kidneys) when there is a drop in blood pressure and volume?
To bring blood pressure back up through vasoconstriction
What is the role of Angiotensin II in the story?
Powerful vasoconstrictor
What does Angiotensin II and Al do instead of having children?
Farm salt and water
What is the impact of Angiotensin II and Al’s farming on the community of Heart-Landia?
Retain volume and increase blood pressure
What is the effect of angiotensin 2?
Vasoconstriction
What is the function of blood vessels in terms of vasoconstriction?
Shunting blood to the heart
What is the mechanism of action for angiotensin (lisinopril) -converting enzyme inhibitors?
Blocking the conversion of angiotensin I to angiotensin II
Reduces production of angiotensin II by blocking the conversion of I to II and increasing bradykinin
What are the effects of angiotensin-converting enzyme inhibitors (lisinopril)?
Vasodilation, sodium and water excretion, potassium retention