Electrocardiogram (ECG) Quiz

What is the purpose of electrocardiography?

• Recording heart sounds

• Recording heart electrical activity

• Monitoring body temperature

• Measuring blood pressure

Where does the cardiac excitation impulse originate from?

• Left atrium

• Right ventricle

• SA (sino-atrial) node

• AV (atrio-ventricular) node

What is the device called that records the electrical impulses of the heart?

• Electrocardiogram

• Electrocardiograph

• Echocardiogram

• Electroencephalogram

Which wave in a normal ECG trace represents ventricular depolarization?

• T wave

• QRS complex

• U wave

• P wave

What does Lead II measure in an ECG?

• Ventricular repolarization

• AV nodal conduction

• Ventricular depolarization

• Atrial repolarization

What is used to determine the heart rate in an ECG?

• Rate calculation

• Rhythm analysis

• Time calibration

• Voltage calibration

How is a regular rhythm defined in an ECG?

• Normal QRS complex

• Upright P waves

• Irregular R-R intervals

• Equal R-R intervals

What is the duration of the ST segment in an ECG?

• 0.06-0.10 seconds

• 0.32-0.4 seconds

• 0.08 seconds

• 0.12-0.21 seconds

What is the amplitude of the T wave in an ECG?

• 0.2 mv

• 1 mv

• 0.1 mv

• 0.5 mv

What is the orientation of the P wave in Lead II?

• Right

• Down

• Left

• Up