3 - The ECG Course - Waves & Complexes

What is the name of the first positive deflection on an ECG?

• Q wave

• R wave

• P wave

• T wave

What does the QRS complex represent on an ECG?

• Atrial repolarization

• Ventricular repolarization

• Atrial depolarization

• Ventricular depolarization

What is the role of the SA node in the heart?

• It is responsible for the T wave

• It causes ventricular contraction

• It acts as the heart's pacemaker

• It depolarizes the Purkinje fibers

What does a biphasic P wave potentially indicate?

• Right atrial enlargement

• Left atrial enlargement

• Normal heart function

• Ventricular hypertrophy

Why might the QRS complex look different in various leads?

• Different heart sizes

• Different electrode placements

• Different heart rates

• Different angles of view