In an ECG pattern, the P wave is caused by:
A.
Repolarization of atrial muscle fibers.
B.
Depolarization of atrial muscle fibers.
C.
Depolarization of ventricular muscle fibers.
D.
Repolarization of ventricular muscle fibers.
In an ECG pattern, the P wave represents:
B. Depolarization of atrial muscle fibers.
Explanation:
- The P wave on an ECG reflects the electrical activity associated with the depolarization of the atria, which leads to atrial contraction.
- The QRS complex represents the depolarization of the ventricles.
- The T wave indicates repolarization of the ventricular muscle fibers.
- Atrial repolarization is usually not visible on the ECG as it is masked by the QRS complex.