Conduction system

What is the function of the SA node?

• It serves as the electrical gateway to the ventricles.

• It delays the passage of electrical impulses to the ventricles.

• It initiates all heartbeats and determines heart rate.

• It represents ventricular repolarization.

Where is the AV node located?

• Within the ventricular myocardium.

• At the apex of the heart.

• On the other side of the right atrium, near the AV valve.

• Near the entrance of the superior vena cava.

What does the QRS complex represent?

• Atrial depolarization.

• The delay of electrical impulses to the ventricles.

• Ventricular repolarization.

• Ventricular depolarization.

Which component acts as the natural pacemaker of the heart?

• Purkinje fibers

• Bundle of His

• AV node

• SA node

What is represented by the T wave on an ECG?

• Atrial depolarization

• Ventricular depolarization

• Ventricular repolarization

• Atrial repolarization

What event does the P wave on the ECG correspond to?

• The delay of electrical impulses at the AV node

• Ventricular repolarization

• Ventricular depolarization

• Atrial depolarization

Which of the following is NOT a part of the cardiac conduction system?

• Mitral valve

• Purkinje fibers

• AV node

• SA node