CVT CVT Pharmacology & Cardiac Medications 2

Question 1

Which medication is used to pharmacologically stress the heart during a nuclear stress test in patients who cannot exercise?

Accepted Answer

Dobutamine or regadenoson

Answer

Pharmacologic stress agents such as regadenoson (vasodilator) or dobutamine (inotrope) are used to mimic exercise-induced coronary flow changes in non-exercising patients.

Question 2

Amiodarone is classified as which type of antiarrhythmic drug?

Accepted Answer

Class III

Answer

Amiodarone is a Class III antiarrhythmic that primarily blocks potassium channels, prolonging the action potential duration and effective refractory period.

Question 3

Which medication is the first-line treatment for ventricular fibrillation refractory to defibrillation?

Accepted Answer

Amiodarone

Answer

Current ACLS guidelines recommend IV amiodarone as the first-line antiarrhythmic for shock-refractory ventricular fibrillation.

Question 4

Atropine increases heart rate by:

Accepted Answer

Blocking muscarinic acetylcholine receptors

Answer

Atropine is an anticholinergic agent that blocks vagal (muscarinic) influence on the SA node, allowing intrinsic automaticity to increase heart rate.

Question 5

Which diuretic is most commonly used in heart failure management and acts primarily on the loop of Henle?

Accepted Answer

Furosemide

Answer

Furosemide (Lasix) is a loop diuretic that inhibits the Na-K-2Cl cotransporter in the ascending loop of Henle, producing potent diuresis to reduce volume overload.

(CVT) Cardiovascular Technologist Certification Practice Test

(CVT) Cardiovascular Technologist Certification Practice Test

CVT CVT Pharmacology & Cardiac Medications 2