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NEETZoologyBody Fluids and Circulation

Which of the following correctly explains a phase/ event in the cardiac cycle in a standard electrocardiogram?

Options

  1. AQRS complex indicates atrial contraction.
  2. BQRS complex indicates ventricular contraction.
  3. CThe time between S and T represents atrial systole.
  4. DP-wave indicates the beginning of ventricular contraction.

Correct answer

B. QRS complex indicates ventricular contraction.

Step-by-step solution

QRS complex indicates ventricular contraction. One can determine the heartbeat rate by counting the number of QRS complexes in an ECG.

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