ECG Interpretation Quiz

What does the ST segment on an ECG represent?

• The beginning of atrial repolarization

• The end of ventricular repolarization

• The completion of ventricular depolarization and start of repolarization

• The start of atrial depolarization

What is the significance of the T wave in an ECG reading?

• It indicates the start of atrial depolarization

• It marks the end of atrial repolarization

• It represents the beginning of ventricular repolarization

• It shows the completion of ventricular depolarization

Which part of the PQRST complex represents atrial depolarization?

• QRS complex

• ST segment

• T wave

• P wave

What might a U wave indicate in an ECG reading?

• Atrial fibrillation

• Normal heart function

• Low potassium levels

• High potassium levels

What is a characteristic of an abnormal ST segment?

• It is always elevated

• It shows no more than 0.5 mm elevation

• It is always flat

• It can be elevated or depressed beyond 1 mm