Cardiac Drugs Mechanisms Quiz

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Which drug inhibits the sodium-potassium ATPase pump, leading to increased intracellular sodium levels?

Levosimendan

Milrinone

Digoxin (correct)

Dobutamine

What is the mechanism of action of Dobutamine that enhances myocardial contractility?

Sensitizing cardiac myofilaments to calcium

Increasing intracellular cyclic AMP levels

Stimulating beta-1 adrenergic receptors (correct)

Inhibiting phosphodiesterase III

Which drug inhibits phosphodiesterase III, leading to increased intracellular cyclic AMP levels?

Digoxin

Milrinone (correct)

Dobutamine

Levosimendan

How does Levosimendan increase myocardial contractility without increasing intracellular calcium levels?

By sensitizing cardiac myofilaments to calcium Signup and view all the answers

Which side effect is associated with Digoxin use?

Visual disturbances Signup and view all the answers

Which drug is historically used but less common now among the mentioned medications?

Ouabain Signup and view all the answers

How do calcium channel blockers affect the heart?

Reduce intracellular calcium overload Signup and view all the answers

Which medication inhibits the late sodium current in cardiac cells?

Ranolazine Signup and view all the answers

What is the primary purpose of cardiotonic/inotropic drugs?

Increase the strength of heart contractions Signup and view all the answers

Which side effect is commonly associated with anti-angina drugs?

Peripheral edema Signup and view all the answers

How do cardiotonic/inotropic drugs improve heart function?

Enhance heart contractions Signup and view all the answers

Which of the following medications works by increasing intracellular calcium levels?

Digoxin Signup and view all the answers

What is the primary mechanism of action of cardiac glycosides?

Increase myocardial contractility Signup and view all the answers

Which common side effect is associated with vasodilators?

Orthostatic hypotension Signup and view all the answers

What is the main function of antiarrhythmics?

Alter electrical conduction in the heart Signup and view all the answers

Which type of drug class is known to lower blood pressure through various mechanisms?

Diuretics Signup and view all the answers

What is a potential side effect of some antiarrhythmics like amiodarone with long-term use?

Eye problems Signup and view all the answers

What effect do ACE inhibitors and ARBs have on potassium levels, especially in individuals with kidney problems?

Elevate potassium levels (hyperkalemia) Signup and view all the answers