CCT CCT - Certified Cardiographic Technician Cardiac Medications and ECG Effects Questions and Answers 1

Question 1

Which ECG change is most commonly associated with digoxin toxicity?

Accepted Answer

Prolonged PR interval with scooped ST depression

Answer

Peaked T waves

Answer

Delta waves

Answer

Widened QRS complex

Question 2

A patient taking amiodarone is most likely to show which ECG finding?

Accepted Answer

Prolonged QT interval

Answer

Shortened QT interval

Answer

Shortened PR interval

Answer

Elevated J point

Question 3

Which class of antiarrhythmic drugs works primarily by blocking sodium channels and is known to widen the QRS complex?

Accepted Answer

Class I (sodium channel blockers)

Answer

Class II (beta-blockers)

Answer

Class III (potassium channel blockers)

Answer

Class IV (calcium channel blockers)

Question 4

Beta-blockers (Class II antiarrhythmics) produce which primary ECG effect?

Accepted Answer

Prolonged PR interval and slowed heart rate

Answer

Shortened PR interval

Answer

Widened QRS

Answer

ST elevation

Question 5

Hyperkalemia is most associated with which ECG change?

Accepted Answer

Peaked, tall T waves

Answer

Flat T waves

Answer

Prolonged QT

Answer

Delta waves

Question 6

A patient receiving IV adenosine during an SVT episode would most likely show which transient ECG finding?

Accepted Answer

Complete AV block with a brief asystole pause

Answer

Ventricular tachycardia

Answer

ST elevation

Answer

Prolonged QT