KROK 1 2017 – Question 127 · KROK (Medicine) · Physiology
The patient’s ECG shows that in the second standard lead from the extremities the P waves are positive, their amplitude is 0,1 mV (norm is 0,05-0,25 mV), duration 0,1 seconds (norm is 0,07-0,10 seconds). It can be concluded that the following process occurs normally in the cardiac atria:
- A. Relaxation
- B. Activation
- C. Repolarization
- D. Depolarization
- E. Contraction
Hint
Remember that the ECG records electrical rather than mechanical events, and ask which electrical phase of the atrial action potential the P wave represents.
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