What is the primary purpose of anticoagulants?
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To reduce the ability of the blood to clot or promote hemostasis.
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What is the primary purpose of anticoagulants?
To reduce the ability of the blood to clot or promote hemostasis.
What is an embolus?
A clot that moves inside the blood vessel, which can cause problems in smaller vessels like the brain, potentially leading to ischemic stroke.
What is the action of beta-adrenergic blockers?
They compete with beta-adrenergic receptor sites in the heart muscle and inhibit the release of renin in the kidneys, decreasing the availability of angiotensinogen II and aldosterone.
What is the role of tissue plasminogen activator?
To dissolve clots and prevent embolism.
What is blood volume?
The sum of the formed elements and plasma volume in the vascular system.
How do calcium channel blockers affect the heart?
They prevent the passage of Ca ions into the cell membrane of myocardial smooth muscle, resulting in arteriolar vasodilation, decreased cardiac workload, blood pressure, afterload, and O2 demand of the heart.
What are the indications for cardiorenal drugs?
BP medication for patients with DM, angina, supraventricular tachyarrhythmias, migraine, and cluster headache.
What is the drug of choice in emergencies with pulmonary and peripheral edema caused by heart failure or renal impairment?
Loop diuretics such as Bumetanide and Furosemide.
What are the key players in the hemostasis process?
Platelets.
How is blood volume related to blood pressure?
Blood volume is directly proportional to blood pressure; a decrease in blood volume results in a decrease in blood pressure.
What are antilipemic medications used for?
To lower abnormally high blood levels of lipids, such as cholesterol, triglycerides, and phospholipids.
Which drugs are commonly used to treat A Fib?
Diltiazem and verapamil.
What conditions can loop diuretics help treat?
Hypercalcemia and hyperkalemia, along with hydration.
What occurs during vascular spasm in hemostasis?
Blood vessels constrict to prevent blood leakage.
What affects peripheral resistance?
The diameter of the vessels and the force of contraction exerted in the smooth muscles.
What is a common side effect of cardiorenal drugs?
Dizziness, headache, fatigue, and peripheral edema.
What is the action of bile-sequestering drugs?
They cause the body to convert hepatic cholesterol to bile acids, decreasing hepatic cholesterol levels and increasing the number of LDL receptors to clear LDL-cholesterol in the blood.
What are common side effects of loop diuretics?
Acute hypovolemia, hypokalemia, hypomagnesemia, hyperuricemia, and ototoxicity.
What is the function of Von Willebrand factor?
To assist in platelet aggregation and stabilize platelet plug formation.
What are the main types of medications for heart failure?
Cardiac glycosides, beta blockers, vasodilators, and diuretics.
What is viscosity in the context of blood flow?
The resistance of fluid to flow; increased viscosity leads to increased flow resistance.
What is the primary function of the descending loop of Henle?
Water reabsorption.
What is the action of HMG-CoA reductase inhibitors?
They inhibit HMG-CoA reductase, decreasing hepatic cholesterol synthesis and increasing LDL receptors to reduce plasma cholesterol concentration.
What are the contraindications for cardiorenal drugs?
Heart failure and AV blocks due to their negative inotropic and dromotropic effects.
What is the indication for bile-sequestering drugs?
Treatment of Type IIA hyperlipoproteinemia (familial hypercholesterolemia) in patients unable to lower LDL levels through dietary changes.
What is adenosine used for?
Used for AV node arrhythmias.
What is the coagulation cascade?
A mechanism of blood clotting activated by chemicals called clotting factors.
What is the most commonly used cardiac glycoside?
Digoxin.
What is hypertension?
A state of elevation in systemic arterial blood pressure caused by an increase in peripheral vascular resistance.
What is a contraindication for using potassium-sparing diuretics with digoxin?
Increased digoxin toxicity if the patient has hyperkalemia.
What substances are reabsorbed in the ascending loop of Henle?
Na, Cl, and K.
Name three examples of HMG-CoA reductase inhibitors.
Atorvastatin, Rosuvastatin, Simvastatin.
What should be monitored when administering cardiorenal drugs?
Vital signs, specifically SBP < 90 mmHg and HR < 60 bpm.
What condition is magnesium sulfate (MgSO4) used to treat?
Digitalis-induced arrhythmias and Torsades de pointes.
What are some examples of bile-sequestering drugs?
Cholestyramine, colesevelam, and colestipol hydrochloride.
What triggers the extrinsic pathway of coagulation?
Trauma.
What are the two types of hypertension?
Essential hypertension (most common, cause unknown) and secondary hypertension (5%, caused by other diseases).
What is a significant risk associated with digoxin?
It has a low therapeutic index and may cause toxicity.
What should be monitored in patients receiving digoxin?
Potassium status and blood glucose levels.
What is reabsorbed in the distal convoluted tubule (DCT)?
Na, Cl, K, Ca, Mg, and HCO3.
What are the potential drug interactions with HMG-CoA reductase inhibitors?
Combining with niacin, mycin, or fluoroquinolones can increase myopathy or rhabdomyolysis, which may lead to renal failure.
What is a key nursing action when tapering off clonidine?
Monitor for rebound hypertension due to abrupt withdrawal.
What are common side effects of cardiorenal drugs?
Headache, dizziness, orthostatic hypotension, tachycardia, flushing, palpitation, nausea/vomiting.
What is the action of Angiotensin Converting Enzymes (ACE) inhibitors?
They inhibit the conversion of angiotensin I to angiotensin II.
What should be monitored when administering loop diuretics?
Weight, blood pressure, and electrolyte imbalances, especially potassium levels.
What nursing actions should be taken when administering bile-sequestering drugs?
Monitor for bleeding, ensure proper dietary management, and advise on fluid intake and reporting severe constipation.
What is the role of potassium chloride (KCl) in cardiac function?
Decreases ectopic pacemakers.
What is the primary action of Angiotensin II Receptor Blockers (ARBs)?
Inhibits aldosterone secretion and blocks angiotensin II from binding to receptor sites, preventing vasoconstriction.
What triggers the intrinsic pathway of coagulation?
Internal damage to the internal layers of blood vessels.
How does digoxin enhance myocardial contractility?
By promoting the movement of calcium from extracellular fluid to intracellular fluid.
What are the effects of potassium-sparing diuretics on the kidneys?
They affect collecting ducts and distal tubules, excreting sodium, water, bicarbonate, and calcium while retaining potassium and hydrogen ions.
What does the renin-angiotensin-aldosterone system (RAAS) do when blood pressure is low?
It causes the kidneys to produce renin.
What should not be taken with CNS depressants?
Clonidine, as it can worsen CNS depression.
What nursing actions should be taken when administering HMG-CoA reductase inhibitors?
Administer 1 hour before or 4 hours after bile-sequestering drugs like cholestyramine.
What are examples of ACE inhibitors?
Captopril and Enalapril.
What are some contraindications for cardiorenal drugs?
Hypersensitivity, early myocardial infarction, severe anemia, angle-closure glaucoma, orthostatic hypotension, cardiac tamponade.
What is the action of fibric acid derivatives?
They reduce cholesterol production early in its formation, mobilize cholesterol from tissues, and increase cholesterol excretion.
In what condition is digitalis used?
In rapid atrial fibrillation (AF) and AV nodal reentry.
What is the action of osmotic diuretics like Mannitol?
Increases osmotic pressure of glomerular filtrate, inhibiting sodium and water reabsorption.
Name two examples of Angiotensin II Receptor Blockers (ARBs).
Losartan and Valsartan.
What are the types of anticoagulants?
Heparin, Warfarin, Antiplatelets, Factor XA inhibitors, Thrombolytic drugs.
What conditions are potassium-sparing diuretics used to treat?
Heart failure (HF) and hypertension (HPN), and they are most effective in treating ascites.
What are common side effects of digoxin?
Bradycardia, nausea, vomiting, and diarrhea.
What is the role of angiotensin II?
It is a potent vasoconstrictor that increases blood pressure.
What is the common pathway in coagulation?
Both intrinsic and extrinsic pathways activate prothrombin (X) factor, converting it to thrombin, which activates fibrinogen to form fibrin.
What is the action of peripheral acting sympatholytics?
Selective antagonism of A1 receptors in peripheral vasculature to produce vasodilation.
What is the action of nicotinic acid?
It decreases triglyceride and apolipoprotein B-100 levels while increasing HDL levels by inhibiting hepatic synthesis of lipoproteins.
What is a common side effect of ACE inhibitors?
Dry cough, fever, altered taste, hypotension, and hyperkalemia.
What drug interactions can occur with cardiorenal drugs?
What are the drug interactions associated with fibric acid derivatives?
They can increase bleeding tendencies when taken with anticoagulants.
What causes angina?
Insufficient oxygen supply to the myocardium due to coronary artery issues.
What are the indications for using osmotic diuretics?
Increased intracranial pressure, acute renal failure due to shock, drug toxicities, and trauma.
What defines a hypertensive crisis?
Systolic blood pressure greater than 180 and diastolic blood pressure greater than 120, requiring immediate hospitalization if there are no signs of organ damage.
What are the contraindications for cardiorenal drugs?
Active bleeding, thrombocytopenia, severe liver impairment, underlying coagulation disorder, ulcer disease, recent surgery, cancer.
What does the cardiovascular system deal with?
The heart and the blood vessels.
What are common side effects of ARBs?
Headache, fatigue, dizziness, cough, and symptoms of upper respiratory tract infection (URTI).
What is the action of Heparin?
Combines with antithrombin III to inactivate thrombin and inhibits the conversion of fibrinogen to fibrin, preventing clot formation.
What are the types of potassium-sparing diuretics?
Aldosterone antagonists (e.g., spironolactone, eplerenone) and sodium channel blockers (e.g., triamterene).
What is the antidote for digoxin toxicity?
Digifab.
How does angiotensin II affect sodium reabsorption?
It increases sodium reabsorption in the proximal convoluted tubule (PCT).
What are examples of alpha adrenergic blockers?
Prazosin and Doxazosin.
What is a significant contraindication for ACE inhibitors?
Pregnancy, as they are teratogenic.
What are some side effects of nicotinic acid?
Vasodilation, flushing, hepatotoxicity, nausea, vomiting, diarrhea, and epigastric pain.
What nursing actions should be taken for patients on cardiorenal drugs?
Teach proper use of sublingual tablets, inform about common headaches, avoid alcohol, and monitor for tolerance.
What are the three classes of anti-anginal drugs?
Nitrates, beta-adrenergic blockers, and calcium channel blockers (CCB).
How is blood pressure regulated?
Changes in blood pressure are detected by baroreceptors located in the aorta and carotid sinus.
What are the side effects of osmotic diuretics?
Hypotension and reflex tachycardia.
What nursing actions should be taken for patients on cardiorenal drugs?
Monitor for bruising and bleeding, minimize venipunctures and injections, apply pressure to puncture sites, and monitor hemoglobin, clotting factors, and platelet levels.
What is the function of the heart?
To pump blood and carry it to the body for oxygenation and nutrients.
Why are ARBs contraindicated in pregnancy?
They are teratogenic.
What are the indications for Heparin?
DVT, Pulmonary embolism, DIC, unstable angina, post MI, cerebral thrombosis, heart failure, atrial fibrillation.
What are some side effects of potassium-sparing diuretics?
Hyperkalemia, gastric upset, and gynecomastia in males.
What is the action of beta blockers in heart failure treatment?
They compete with beta-adrenergic receptors and inhibit renin release in kidneys.
What are the classifications of antihypertensives?
Central-acting sympatholytics, peripheral-acting sympatholytics, calcium channel blockers, vasodilators, and diuretics.
What should be monitored during ACE inhibitor therapy?
WBC and differential counts, as well as potassium levels.
What should be monitored when administering alpha adrenergic blockers?
ECG for arrhythmias and watch for reflex tachycardia and orthostatic hypotension.
What are the contraindications for nicotinic acid?
Hypersensitivity to nicotinic acid, hepatic or renal dysfunction, active peptic ulcer disease, gout, heart disease, muscle disorder, or arterial bleeding.
How do diuretics reduce blood pressure?
By decreasing circulatory blood volume through increased urine output, resulting in improved cardiac output.
What is chronic stable angina caused by?
Stress.
What is the renal system composed of?
The kidneys, ureters, bladder, and urethra.
What is the first-line treatment for hypertension?
Thiazide and thiazide-like diuretics along with ACE inhibitors and ARBs.
What is the action of renin inhibitors?
Inhibits renin production.
What divides the right and left atrium?
The interatrial septum.
What is the action of Factor Xa inhibitors?
They interfere with the coagulation pathway by neutralizing factor Xa, inhibiting thrombin and thrombus formation, especially in newly formed thrombi.
What are the side effects of Heparin?
Bruising, hematoma formation, skin necrosis, and thrombocytopenia.
What nursing action should be taken regarding weight monitoring?
Record weight each morning after voiding and before breakfast.
What do ACE inhibitors do?
They inhibit the conversion of angiotensin I to angiotensin II.
What is the action of central-acting sympatholytics?
They inhibit vasomotor centers in the brainstem, decreasing sympathetic outflow.
What is the indication for cholesterol absorption inhibitors?
To inhibit the absorption of cholesterol and related phytosterols from the small intestine.
What regulates heart rhythm?
The SA node (pacemaker).
What is the action of beta adrenergic blockers?
Compete with beta-adrenergic receptor sites in the heart and inhibit renin release in kidneys.
What is unstable angina also known as?
Pre-infarction or crescendo angina.
What is the functional unit of the kidneys?
Nephrons.
What is a common use for thiazide diuretics?
To treat peripheral edema.
What is an example of a renin inhibitor?
Aliskiren.
What are the contraindications for Heparin?
Stroke, peptic ulcer, coagulation disorders, active bleeding, and severe thrombocytopenia.
What are some examples of Factor Xa inhibitors?
Fondaparinux.
What is the pathway of blood circulation starting from the body?
Blood collects in the SVC and IVC, enters the right atrium, passes through the tricuspid valve to the right ventricle, and then goes to the pulmonary circuit.
How do ARBs function in heart failure treatment?
They block angiotensin II from binding to its receptors, preventing vasoconstriction.
What is congestive heart failure (CHF)?
A condition where the heart cannot pump enough blood to meet the myocardial oxygen demand.
What are common side effects of central-acting sympatholytics?
Depression, drowsiness, edema, dry mouth, and impotence.
What are the phases of action potential in cardiac cells?
Phase 0: Depolarization; Phase 1: Balanced Na+ ions; Phase 2: Plateau; Phase 3: Rapid repolarization; Phase 4: Resting phase.
What are examples of beta-1 adrenergic blockers?
Metoprolol, Atenolol, and Bisoprolol.
What are some side effects of cholesterol absorption inhibitors?
Back pain, fatigue, abdominal pain, and pharyngitis.
What is the action of nitrates?
Relax vascular smooth muscles, decreasing afterload and cardiac workload.
What is the role of nephrons?
To maintain sodium, potassium, water, and other electrolytes regulation through reabsorption and secretion.
What are some examples of thiazide diuretics?
Chlorothiazide, Indapamide, Metolazone, and Hydrochlorothiazide.
What is the main goal of diuretics?
To reduce blood pressure by decreasing circulatory blood volume through increased urine output.
What drug interactions increase the risk of hemorrhage with Factor Xa inhibitors?
Antiplatelets and NSAIDs.
What happens in left-sided heart failure?
Blood accumulates in the pulmonary circuit.
What is the antidote for Heparin?
Protamine sulfate.
What is the effect of nitrates on the cardiovascular system?
They cause vasodilation and reduce myocardial oxygen demand.
What causes left-sided heart failure?
It is commonly caused by myocardial infarction (MI), cardiomyopathy, and chronic hypertension.
What are contraindications for central-acting sympatholytics?
Asthma, tachycardia, cardiogenic shock, second or third-degree heart block, and heart failure.
What is the action of Class I Na+ channel blockers?
They control arrhythmias by altering myocardial cell membranes and decreasing Na+ influx.
What are common side effects of beta adrenergic blockers?
Bradycardia, hypotension, fatigue, lethargy, and erectile dysfunction.
What nursing actions should be taken for patients on cholesterol absorption inhibitors?
Monitor blood cholesterol and lipid levels, check CK levels, and assess for fat-soluble vitamin deficiency.
What are common side effects of nitrates?
Effects usually decrease when dosage is reduced.
What are potential side effects of thiazide diuretics?
Reduced blood volume, orthostatic hypotension, hypokalemia, hyperglycemia, and hyponatremia.
What does the proximal convoluted tubule (PCT) reabsorb?
Sodium, potassium, glucose, amino acids, bicarbonate, and water.
What are the types of diuretics mentioned?
Carbonic Anhydrase Inhibitors, Loop Diuretics, Osmotic Diuretics, Thiazide Diuretics, and Potassium-sparing Diuretics.
What is the action of thrombolytics?
They dissolve an existing thrombus by converting plasminogen to plasmin, which lyses thrombi and other plasma proteins.
What is the action of Warfarin?
Inhibits Vitamin K synthesis in the liver.
What is the role of the sinoatrial node (SA node)?
It initiates the heartbeat.
What is the role of hydralazine in heart failure treatment?
It decreases systemic arteriolar resistance and reduces afterload.
What happens during right-sided heart failure?
It occurs as a consequence of left-sided heart failure, leading to increased pressure in pulmonary arteries and workload on the right ventricle.
What drug interactions can occur with central-acting sympatholytics?
They can decrease the effects of levodopa and interact with beta blockers, prazosin, tricyclic antidepressants, verapamil, lithium, and MAOIs.
What is a contraindication for beta adrenergic blockers?
Asthma.
What are the side effects of Quinidine?
Increased QT interval, torsades de pointes, thrombocytopenia.
What should a patient do if anginal pain is not relieved after three sublingual nitroglycerin tablets?
Go to the emergency department.
What is the action of Carbonic Anhydrase Inhibitors?
Blocks the action of carbonic anhydrase, preventing the exchange of H+ ions with sodium and water.
What are the indications for Warfarin?
Prevent pulmonary embolism caused by DVT, MI, prosthetic heart valves, or chronic AF.
What are the indications for thrombolytics?
Thromboembolic disorders such as AMI, acute ischemic stroke, and PAOD.
What does automaticity refer to in heart tissue?
The ability to spontaneously develop action potentials.
What should be checked prior to administering beta adrenergic blockers?
The patient's apical pulse.
What should be monitored when administering Quinidine?
Hyperkalemia, as it enhances digitalis toxicity.
What should be avoided during nitrate therapy?
Alcohol.
Name two examples of Carbonic Anhydrase Inhibitors.
Acetazolamide and Methazolamide.
What are the side effects of Warfarin?
Hemorrhage, prolonged bleeding time, hepatitis.
What are some examples of thrombolytics?
Alteplase, Reteplase, Tenecteplase, Urokinase, Streptokinase.
What is preload?
The end-diastolic pressure and the work imposed on the heart before contraction begins.
What is the action of calcium channel blockers?
Prevent the passage of calcium ions into cell membranes, resulting in arteriolar vasodilation.
How should nitrates be stored?
In a cool, dark place in a tightly closed container.
What are common side effects of Carbonic Anhydrase Inhibitors?
Metabolic acidosis, hypokalemia, and renal stone formation.
What is the antidote for Warfarin?
Phytomenadione (Vitamin K).
What are the side effects of thrombolytics?
Bleeding, arrhythmias, urticaria, fever, hemorrhage.
What is afterload?
The pressure the cardiac muscle exerts to move blood into the aorta.
What is the action of Loop Diuretics?
Inhibits Na and Cl absorption in the loop of Henle, increasing Na and water excretion.
What is the action of antiplatelet drugs?
Arrests platelet aggregation, thereby preventing thrombolytic events.
What is the antidote for thrombolytics?
Aminocaproic acid.
What is stroke volume?
The amount of blood ejected from the left ventricle with each contraction.
What are some examples of antiplatelet drugs?
Aspirin, Clopidogrel, Dipyridamole, Ticlopidine, Abciximab, Tirofiban.
How is cardiac output calculated?
Cardiac output (CO) = Stroke volume (SV) x Heart rate (HR).
What is the action of Class 1B Na+ Channel Blockers like Lidocaine?
Decrease Na influx in ischemic episodes, shorten phase 3 repolarization, and decrease action potential duration.
What are the side effects of antiplatelet drugs?
Bleeding, pancytopenia, neutropenia, hemorrhage, thrombocytopenic purpura, abnormal stools, pain at injection site.
What are the indications for Class 1B Na+ Channel Blockers?
Ventricular arrhythmias.
What is a side effect of Class 1B Na+ Channel Blockers?
CNS toxicity.
What is the action of Class 1C Na+ Channel Blockers like Propafenone?
Decrease Na influx, slow phase 0 depolarization, slow conduction velocity, and increase QRS duration.
What are the indications for Class 1C Na+ Channel Blockers?
Last drug for refractory ventricular arrhythmias.
What is a potential side effect of Class 1C Na+ Channel Blockers?
Forms new forms of arrhythmias.
What is the action of Beta Blockers like Metoprolol?
Decreases SA node automaticity and AV nodal conduction, increases PR interval.
What are the indications for Beta Blockers?
SVT, post-MI, arrhythmia prophylaxis.
What are some side effects of Beta Blockers?
Impotence, bradycardia, depression, worsens asthma.
What is the action of Class III K+ Channel Blockers like Sotalol?
Prolongs phase 3 repolarization and increases effective refractory period.
What are the indications for Class III K+ Channel Blockers?
Atrial flutter (AF), ventricular arrhythmia.
What are some side effects of Class III K+ Channel Blockers?
Bradycardia, torsades de pointes, photosensitivity, hypotension.
What is the action of Class IV Ca++ Channel Blockers like Verapamil?
Blocks Ca channels, slows AV node conduction, and shortens action potential.
What are the indications for Class IV Ca++ Channel Blockers?
Atrial fibrillation (AF), AV node re-entry.