The time required for an impulse to travel from the SA node to the ventricular muscle is the ________ on an ECG
A) P-R segment
B) Q-T interval
C) P-R interval
D) S-T segment
C
Explanation:
A) The P-R segment is the time it takes an impulse to travel from the AV node to the ventricles.
B) The Q-T interval is the cycle of ventricular depolarization and repolarization.
D) The S-T segment represents the delay between ventricular depolarization and repolarization.
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