Given below is the ECG of a normal human. Which one of its components is correctly interpreted below?
Correct answer: A. Complex QRS - one complete pulse
- A. Complex QRS - one complete pulse
- B. Peak T initiation of total cardiac contraction
- C. Peak P and peak R together systolic and diastolic blood pressures
- D. Peak P initiation of left atrial contraction only
Explanation
The complex QRS on an ECG represents the depolarization (contraction) of the ventricles of the heart. It consists of several waves, including Q, R, and S waves, and reflects the electrical activity that leads to the contraction of the ventricles. This complex corresponds to one complete heartbeat, encompassing the ventricular depolarization and subsequent contraction. Therefore, option A is the correct interpretation of the Complex QRS component on the ECG.
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