Comprehensive Cardiac Medications: Diuretics, Beta-Blockers, ACE Inhibitors, and Lipid-Lowering Agents

What are loop diuretics used for?

They are used for rapid fluid removal, pulmonary edema, edematous states, and hypertension.

What is an example of a loop diuretic?

Furosemide (Lasix)

What is the mechanism of action of Furosemide?

It acts on the ascending loop of Henle to block reabsorption.

What are common adverse effects of Furosemide?

Hyponatremia, hypochloremia, dehydration, hypotension, hypokalemia, and ototoxicity.

What is the primary indication for Hydrochlorothiazide?

Essential hypertension and edema.

What is the mechanism of action of Thiazide diuretics?

They increase renal excretion of sodium, chloride, potassium, and water.

What are some adverse effects of Hydrochlorothiazide?

Hyponatremia, hypochloremia, dehydration, hypotension, hypokalemia, hyperglycemia, and hyperuricemia.

What is the role of potassium-sparing diuretics?

They promote sodium and water excretion while retaining potassium.

What is an example of a potassium-sparing diuretic?

Spironolactone (Aldactone)

What is the mechanism of action of Spironolactone?

It blocks aldosterone in the distal nephron, leading to potassium retention and sodium excretion.

What are the indications for Spironolactone?

Hypertension, edematous states, and heart failure.

What are common adverse effects of Spironolactone?

Hyperkalemia and endocrine effects.

What is Mannitol used for?

Prophylaxis of renal failure and reduction of intracranial and intraocular pressure.

What is the mechanism of action of Mannitol?

It increases osmotic pressure in tubules and is freely filtered at the glomerulus.

What are the adverse effects of Mannitol?

Edema and potential to precipitate heart or pulmonary edema.

What is the indication for Potassium Chloride?

Treatment and prevention of potassium depletion (hypokalemia).

What are the adverse effects of Potassium Chloride?

Arrhythmias, abdominal pain, diarrhea, nausea, vomiting, and hyperkalemia.

What are the steps to manage hyperkalemia?

Withhold potassium, infuse calcium gluconate, insulin & glucose, sodium bicarbonate, Kayexalate, or dialysis.

What is the mechanism of action of Calcium Gluconate in hyperkalemia?

It stabilizes the cardiac cell membrane and raises the threshold potential.

What are beta-adrenergic blockers used for?

They are used to treat angina pectoris, hypertension, cardiac dysrhythmias, myocardial infarction, and heart failure.

What are common adverse effects of beta-adrenergic blockers?

Bradycardia, reduced cardiac output, heart failure, atrioventricular block, bronchoconstriction, and hyperglycemia.

What is an example of a first-generation beta-adrenergic blocker?

Propranolol

What distinguishes second-generation beta-adrenergic blockers?

They produce selective blockade of beta1 receptors, primarily affecting the heart.

What is an example of a second-generation beta-adrenergic blocker?

Metoprolol

What is an example of a third-generation beta-adrenergic blocker?

Carvedilol

What is the mechanism of action of third-generation beta-adrenergic blockers?

They act on blood vessels to cause dilation and may produce nonselective or cardioselective beta blockade.

What is the mechanism of action of Propranolol?

It blocks cardiac beta1 receptors, reducing heart rate, ventricular contraction force, and impulse conduction through the AV node.

What are the indications for Propranolol?

Hypertension, angina pectoris, cardiac arrhythmias, myocardial infarction, migraine headache, and 'stage fright'.

What are the therapeutic actions of Propranolol?

Decreased blood pressure and heart rate.

What are the serious adverse effects of Propranolol?

Blockade of beta1 receptors can lead to bradycardia and reduced cardiac output; blockade of beta2 receptors can affect lung function.

What drug interactions should be considered with Propranolol?

Calcium channel blockers and insulin.

What is the mechanism of action of Metoprolol?

It produces selective blockade of beta1 receptors in the heart.

What are the indications for Metoprolol?

Hypertension, angina pectoris, heart failure, and myocardial infarction.

What are the therapeutic actions of Metoprolol?

Decreased blood pressure and heart rate, reduced frequency of angina attacks, and decreased cardiovascular mortality in heart failure.

What are the major adverse effects of Metoprolol?

Bradycardia, reduced cardiac output, AV heart block, and rebound cardiac excitation after abrupt withdrawal.

What is the mechanism of action of Carvedilol?

It provides nonselective blockade of beta-1 and beta-2 receptors plus alpha-1 blockade, leading to peripheral vasodilation.

What are the indications for Carvedilol?

Hypertension, angina pectoris, cardiac dysrhythmias, migraine prophylaxis, myocardial infarction treatment, and heart failure.

What are the therapeutic actions of Carvedilol?

Lowering of blood pressure and heart rate, improved cardiac output, and reduced symptoms in heart failure patients.

What adverse effects can Carvedilol cause?

Postural hypotension due to alpha-adrenergic blockade.

What is the primary therapeutic goal of ACE inhibitors?

Management of hypertension and heart failure.

What are common adverse effects of ACE inhibitors?

First-dose hypotension, cough, hyperkalemia, renal failure, fetal injury, angioedema, and neutropenia.

What is the mechanism of action of Captopril?

It blocks the conversion of angiotensin I to angiotensin II and inhibits the breakdown of bradykinin.

What are the indications for Captopril?

Hypertension, heart failure, myocardial infarction, and diabetic kidney disease.

What are the adverse effects of Captopril?

Cough, hypotension, hyperkalemia, angioedema, neutropenia, and fetal injury.

What is the mechanism of action of Enalapril?

It is a prodrug converted to enalaprilat, which inhibits ACE, preventing the conversion of angiotensin I to angiotensin II.

What are the indications for Enalapril?

Management of hypertension and symptomatic heart failure.

What are the adverse effects of Enalapril?

Hypotension, cough, hyperkalemia, angioedema, headache, dizziness, and renal impairment.

What is the mechanism of action of Lisinopril?

It inhibits ACE, leading to decreased levels of angiotensin II and aldosterone.

What are the indications for Lisinopril?

Hypertension, heart failure, and treatment of stable patients after acute myocardial infarction.

What are the adverse effects of Lisinopril?

Dizziness, hypotension, cough, hyperkalemia, angioedema, fatigue, and renal dysfunction.

What is the mechanism of action of Angiotensin II Receptor Blockers (ARBs)?

They prevent angiotensin II from binding to its receptors, causing blood vessels to dilate and reducing aldosterone release.

What are the indications for Losartan?

Hypertension, diabetic nephropathy in type 2 diabetics, and stroke prevention.

What are the adverse effects of Losartan?

Dizziness, hypotension, hyperkalemia, fatigue, diarrhea, and renal impairment.

What is the mechanism of action of Verapamil?

It inhibits calcium transport into myocardial and vascular smooth muscle cells, affecting excitation-contraction coupling.

What are the indications for Verapamil?

Angina pectoris, essential hypertension, and cardiac dysrhythmias.

What are the adverse effects of Verapamil?

Constipation, dizziness, headache, hypotension, heart failure, bradycardia, peripheral edema, nausea, and rash.

What is the mechanism of action of Diltiazem (Cardizem)?

Inhibits the transport of calcium into myocardial and vascular smooth muscle cells, affecting excitation-contraction coupling.

What are the indications for Diltiazem?

Hypertension, angina pectoris, and cardiac dysrhythmias.

What are common adverse effects of Diltiazem?

Peripheral edema, headache, dizziness, bradycardia, heart failure, AV block, nausea, rash.

What are the drug interactions associated with Diltiazem?

Digoxin and beta-blockers.

What food interaction is significant with Diltiazem?

Grapefruit juice.

What is the mechanism of action of Nifedipine (Procardia XL)?

Inhibits calcium ion influx across cell membranes of cardiac and vascular smooth muscle, causing vasodilation.

What are the therapeutic indications for Nifedipine?

Management of hypertension and angina pectoris.

What are the common adverse effects of Nifedipine?

Peripheral edema, headache, dizziness, flushing, palpitations, nausea, muscle cramps, cough.

What is a notable side effect of Nifedipine?

More likely to cause reflex tachycardia.

What are the drug interactions associated with Nifedipine?

Beta-blockers, grapefruit juice (increases levels), rifampin (decreases levels), other antihypertensives.

What is the mechanism of action of Amlodipine (Norvasc)?

Inhibits calcium ion influx across cell membranes, leading to relaxation of vascular smooth muscle and vasodilation.

What are the indications for Amlodipine?

Management of hypertension and angina pectoris.

What are the common adverse effects of Amlodipine?

Peripheral edema, dizziness, fatigue, flushing, palpitations, headache, nausea.

What drug interactions are associated with Amlodipine?

Simvastatin (increases simvastatin levels), CYP3A4 inhibitors or inducers.

What are vasodilators used for?

To open blood vessels, reducing blood pressure and decreasing the workload on the heart.

What are the primary therapeutic goals of vasodilators?

Hypertension, hypertensive crisis, angina pectoris, heart failure, myocardial infarction.

What are common adverse effects of vasodilators?

Postural hypotension, reflex tachycardia, expansion of blood volume.

What is the mechanism of action of Hydralazine (Apresoline)?

Direct-acting peripheral arteriolar vasodilator that relaxes smooth muscle in the arterioles.

What are the indications for Hydralazine?

Management of moderate to severe hypertension and heart failure (in combination with isosorbide dinitrate).

What are the common adverse effects of Hydralazine?

Reflex tachycardia, increased blood volume, systemic lupus erythematosus-like syndrome.

What is the mechanism of action of Digoxin (Lanoxin)?

Inhibits the sodium-potassium ATPase pump, increasing intracellular calcium and improving myocardial contractility.

What are the indications for Digoxin?

Heart failure and rate control in atrial fibrillation or atrial flutter.

What are common adverse effects of Digoxin?

Dysrhythmias, hypokalemia, elevated digoxin levels, GI disturbances, fatigue, visual disturbances.

What are the drug interactions associated with Digoxin?

Diuretics, ACE inhibitors, ARBs, sympathomimetics, quinidine, verapamil.

What is the primary therapeutic goal of antiarrhythmic drugs?

Restoration of normal sinus rhythm and prevention of life-threatening arrhythmias.

What is the mechanism of action of Amiodarone (Cordarone)?

Prolongs action potential duration and refractory period; blocks potassium channels.

What are the indications for Amiodarone?

IV for initial treatment of recurrent ventricular fibrillation and unstable ventricular tachycardia.

What are common adverse effects of Amiodarone?

Pulmonary toxicity, cardiotoxicity, thyroid toxicity, liver toxicity, dermatologic toxicity.

What are the drug interactions associated with Amiodarone?

Warfarin, digoxin, beta-blockers, calcium channel blockers, statins.

What is the mechanism of action of Nitroglycerin (Nitrostat)?

Relaxes smooth muscle in blood vessels, leading to peripheral vasodilation and decreased preload.

What are the indications for Nitroglycerin?

Stable angina and variant angina.

What are common adverse effects of Nitroglycerin?

Headache, orthostatic hypotension, reflex tachycardia.

What are the drug interactions associated with Nitroglycerin?

PDE5 inhibitors (e.g., sildenafil) causing severe hypotension, alcohol, antihypertensives.

What is the mechanism of action of Isosorbide Mononitrate?

Relaxes vascular smooth muscle, leading to peripheral vasodilation and decreased preload.

What are the indications for Isosorbide Mononitrate?

Prophylaxis of angina pectoris and treatment of chronic stable angina.

What is the primary therapeutic action of medications for chronic stable angina?

Decreased frequency and severity of anginal attacks and improved exercise tolerance.

What are common adverse effects of medications for chronic stable angina?

Headache, dizziness, hypotension, flushing, tachycardia, syncope, nausea, vomiting.

Which drug class can cause severe hypotension when combined with PDE5 inhibitors?

Medications for chronic stable angina.

What is the mechanism of action of Prazosin?

Inhibits alpha-1 adrenergic receptors in vascular smooth muscle, causing vasodilation.

What is a primary indication for Prazosin?

Management of hypertension.

What are common adverse effects of Prazosin?

Orthostatic hypotension, reflex tachycardia, nasal congestion.

What is the mechanism of action of Clonidine?

Stimulates alpha-2 adrenergic receptors in the brainstem, decreasing sympathetic outflow.

What is Clonidine primarily used to treat?

Hypertension.

What are common adverse effects of Clonidine?

Drowsiness, dry mouth, rebound hypertension if discontinued abruptly.