The time it takes for electrical impulses to travel from the SA node to the AV node is the ____.

A) S-T segment
B) Q wave
C) R wave
D) P-R interval
E) Q-T interval

P-R Interval

A measurement on an electrocardiogram (ECG) reflecting the time between the onset of atrial depolarization and the onset of ventricular depolarization; important in diagnosing cardiac conditions.

S-T Segment

A portion of the ECG tracing between the S and T waves, representing the period when the heart's ventricles are depolarized.

Electrical Impulses

Signals generated by nerve or muscle cells to communicate and facilitate bodily functions.