Match each ECG wave or complex with the corresponding action in the cardiac cycle.
-Ventricular depolarization
A)QRS complex
B)P wave
C)T wave
D)U wave

Question

Quizplus · Accepted Answer

The QRS complex represents ventricular depolarization, which is the electrical activation of the ventricles that precedes their contraction.

Answer: B 
 The P wave represents atrial depolarization, which is the electrical activation of the atria that precedes their contraction. This occurs just before the QRS complex, which represents ventricular depolarization.

Answer: C 
 The T wave represents ventricular repolarization, which is the electrical recovery of the ventricles after their contraction. This occurs just after the QRS complex.

Answer: D 
 The U wave is a small wave that follows the T wave and represents the repolarization of the papillary muscles in the ventricles. However, it is not always present and its exact function is not fully understood. It does not correspond to a specific action in the cardiac cycle.

Match Each ECG Wave or Complex with the Corresponding Action