Understanding ECG: The Heart's Rhythm

What is the primary function of an ECG?

• To check body temperature

• To assess lung capacity

• To monitor heart rhythms

• To measure blood pressure

Where does the electrical activity in the heart begin?

• In the ventricles

• In the AV node

• In the SA node

• In the atria

What does the P wave on an ECG represent?

• Ventricular repolarization

• Atrial repolarization

• Atrial depolarization

• Ventricular depolarization

Which part of the ECG is larger, the P wave or the QRS complex?

• It varies with each heartbeat

• They are the same size

• QRS complex

• P wave

What does the T wave on an ECG indicate?

• Atrial repolarization

• Ventricular repolarization

• Ventricular depolarization

• Atrial depolarization