Question

what ecg component corresponds to the time it takes for the electrical impulse of the heart to spread through the atria to the av node?
multiple choice
st segment
pq interval
qrs complex
p wave

Explanation:

The PQ interval on an ECG represents the time it takes for the electrical impulse to spread through the atria (P wave) and then travel through the AV node (the delay between P wave and QRS complex). The ST segment is related to ventricular repolarization. The QRS complex is ventricular depolarization. The P wave is just atrial depolarization. So the PQ interval is the correct component for the described time (atrial spread to AV node).

Answer:

B. PQ interval