NTA NTA Pharmacology and Medications

Question 1

What is the primary cardiac action of atropine?

Accepted Answer

Increases heart rate by blocking parasympathetic (vagal) tone

Answer

Slows heart rate by increasing vagal tone

Answer

Lowers blood pressure by vasodilation

Answer

Converts atrial fibrillation to sinus rhythm

Question 2

Which drug is the first-line pharmacologic treatment for terminating supraventricular tachycardia (SVT)?

Accepted Answer

Adenosine

Answer

Amiodarone

Answer

Atropine

Answer

Aspirin

Question 3

Which ECG finding is characteristic of digoxin toxicity?

Accepted Answer

Prolonged PR interval and scooped ST depression

Answer

Shortened QT interval only

Answer

Widened QRS complex with RBBB pattern

Answer

ST elevation in all leads

Question 4

Amiodarone exerts its antiarrhythmic effect through which mechanism?

Accepted Answer

Blocks sodium, potassium, and calcium channels while also having beta-blocking properties

Answer

Blocks sodium channels exclusively

Answer

Stimulates the SA node to increase rate

Answer

Increases sympathetic tone to stabilize rhythm

Question 5

What is the first-line vasopressor used during ACLS for ventricular fibrillation (VF) or pulseless ventricular tachycardia (pVT)?

Accepted Answer

Epinephrine

Answer

Digoxin

Answer

Atropine

Answer

Adenosine

Question 6

How do beta-blocker medications affect heart rate?

Accepted Answer

Decrease heart rate by blocking beta-1 adrenergic receptors

Answer

Increase heart rate by stimulating beta-1 receptors

Answer

Have no measurable effect on resting heart rate

Answer

Cause irregular heart rate through SA node suppression